The Evidence Library · Peer-reviewed, gaps shown openly

The evidence behind every formula.

133 clinical sources across 18 actives. Randomized trials, meta-analyses, and systematic reviews where the evidence is strong — and transparent callouts where it isn't.

133Clinical
Sources
18Unique
Actives
98RCTs, MAs &
Systematic Reviews
76%Direct Links
to PubMed/PMC

How to read this page. Each study carries a design badge — RCT, MA (meta-analysis), SR (systematic review), Pilot, MECH (mechanism / preclinical), OBS (observational), REG (regulatory), PK (pharmacokinetic), Review. Higher-tier evidence is darker; lower-tier is grey. Use the pills below to jump to an active. Click any study to read the source.

HIPAA Compliant HIPAA
Compliant
Tadalafil
20 mg · 5 mg

Tadalafil

PDE5 Inhibitor

Long-acting PDE5 inhibitor. Enhances the nitric oxide → cGMP pathway for penile blood flow; elevation lasts up to 36 hours. Extensively studied in ED, BPH/LUTS, and pulmonary arterial hypertension.

RCT
2009 · Eur Urol
Effects of once-daily tadalafil on erectile function in men with ED and signs and symptoms of BPH
Dose-response RCT (2.5–20 mg). Daily tadalafil improved both IIEF-EF and IPSS-LUTS scores. The study that established tadalafil's dual indication.
PubMed
MA
2019 · Sex Med Open Access
Meta-analysis of long-term efficacy and tolerance of tadalafil daily vs tadalafil on-demand
24-week meta-analysis. Both regimens significantly improved IIEF-EF vs placebo. No meaningful efficacy difference — informs the "daily vs on-demand" choice.
Oxford
MA
AAFP FPIN · 2024
Tadalafil for the treatment of lower urinary tract symptoms in men with benign prostatic hyperplasia
Meta-analysis of 15 RCTs. Tadalafil significantly improves IPSS vs placebo. Supports the LUTS claim independent of ED improvement.
AAFP
SR+MA
PMC9972064
Tamsulosin + Tadalafil vs Tamsulosin alone in LUTS secondary to BPH
Systematic review + meta-analysis. Combination therapy outperforms monotherapy on IPSS and Qmax. Supports combination-formula framing.
PMC
SR+MA
Urol Int · Karger
Efficacy and safety of tadalafil once-a-day vs on-demand in patients with ED
Systematic review + meta-analysis evaluating SEP-2 and SEP-3 sexual encounter profiles across daily and on-demand dosing.
Karger
RCT
2-year Tadalafil RCT · PMC11156461
Long-term tadalafil once daily in Chinese men with ED: 2-year final analysis
Post-marketing, multicenter, randomized, open-label trial. Confirms durable efficacy and tolerability over 24 months.
PMC
RCT
2006
Efficacy and safety of daily tadalafil in men with ED previously unresponsive to on-demand tadalafil
Daily dosing salvaged ~40% of prior on-demand nonresponders. Informs the daily-dose rescue strategy in Cruise Control and Epiq Chew.
PubMed
Sildenafil
80 mg · 70 mg

Sildenafil

PDE5 Inhibitor

The foundational PDE5 inhibitor. Same NO–cGMP mechanism as tadalafil, faster onset, shorter window. One of the most RCT-studied molecules in men's sexual health medicine.

MA
2002 · Arch Intern Med
Sildenafil for male erectile dysfunction: a systematic review and meta-analysis
Meta-analysis of 27 randomized trials covering diverse etiologies (diabetes, spinal cord injury, post-prostatectomy). The anchor citation for sildenafil efficacy.
PubMed
RCT
2005
Double-blind, randomized study of sildenafil citrate for ED in men with multiple sclerosis
Pivotal RCT demonstrating efficacy in neurologically-mediated ED. IIEF improvements vs placebo.
PMC
RCT
2001 · Int J Impot Res
Dose-escalation study to assess the efficacy and safety of sildenafil citrate in men with ED
26-week RCT across broad etiologies. Dose-response established for the 25 / 50 / 100 mg tiers.
PubMed
RCT
2002 · PMC1874251
Onset and duration of action of sildenafil for the treatment of erectile dysfunction
RCT documenting median onset ~30 minutes and duration to ~4 hours. Foundational for "onset" claims in sildenafil-based formulas.
PMC
RCT
2013
Erectile function, erection hardness and tolerability in men treated with sildenafil 100 mg vs 50 mg
Direct head-to-head RCT. 100 mg produced greater erection-hardness scores and IIEF improvement vs 50 mg, with acceptable tolerability.
PubMed
RCT
2008
Efficacy, tolerability and satisfaction with sildenafil 100 mg titration vs continued 50 mg
RCT in men previously on 50 mg. Titration to 100 mg yielded higher treatment satisfaction and erection hardness.
PubMed
SR+MA
2024 · Eur Heart J Cardiovasc Pharmacother
Long-term effects of PDE5 inhibitors on cardiovascular outcomes and death
Systematic review + meta-analysis. PDE5 inhibitors associated with no increase — and possibly reduction — in major adverse cardiovascular events.
Oxford
RCT
2008
Long-term safety and effectiveness of sildenafil citrate in men with erectile dysfunction
4-year extension study documenting durable IIEF gains and consistent safety profile.
PubMed
OBS
2001 · Cleveland Clinic J Med
Safe use of sildenafil in patients with coronary artery disease
Observational hemodynamic analysis in CAD patients. Establishes the safety framing clinicians use when evaluating PDE5 candidacy.
CCJM
Vardenafil
5 mg

Vardenafil

PDE5 Inhibitor
Used in Epiq Chew

Highly selective PDE5 inhibitor, comparable onset to sildenafil. The orodispersible (ODT) formulation body of evidence — POTENT I and II — directly supports the Epiq Chew delivery format.

RCT
2002
Sustained efficacy and tolerability of vardenafil: 26-week placebo-controlled pivotal trial
Foundational Phase III RCT demonstrating sustained IIEF-EF improvements across 26 weeks of treatment.
PubMed
RCT
2003
Vardenafil in men with ED and diabetes: multicenter double-blind placebo-controlled fixed-dose study
Pivotal RCT in diabetic ED. Clinically meaningful improvements at both 10 and 20 mg versus placebo.
PubMed
RCT
2010 (POTENT I)
POTENT I: efficacy and safety of an orodispersible vardenafil formulation for ED
Randomized trial of the ODT form — directly relevant to the Epiq Chew delivery format. IIEF and SEP outcomes consistent with the original tablet.
PubMed
RCT
2010 (POTENT II)
POTENT II: efficacy and safety of an orodispersible vardenafil formulation for ED
Replication RCT confirming the ODT's efficacy and tolerability. Completes the POTENT pair of pivotal orodispersible trials.
PubMed
RCT
RELY-II trial · PMC2494903
Vardenafil demonstrates first-dose success and reliability of penetration and maintenance of erection
RCT focused on first-dose efficacy (>75% success on first administration) — relevant for men new to PDE5 therapy.
PMC
RCT
2006
Vardenafil 20 mg demonstrated superior efficacy to 10 mg in Japanese men with diabetes and ED
Dose-comparison RCT in diabetic ED. 20 mg outperformed 10 mg on both SEP-3 and IIEF-EF domains.
PubMed
RCT
2004
Erectile response with vardenafil in sildenafil nonresponders: multicentre, double-blind, 12-week flexible-dose RCT
Rescue RCT. Men who failed on sildenafil showed clinically meaningful IIEF gains when switched to vardenafil.
PubMed
RCT
2006 · Neurology
Efficacy and safety of vardenafil in men with ED caused by spinal cord injury
RCT in SCI-related ED. Supports neurologically-mediated use cases and adds to the breadth of vardenafil's evidence base.
Neurology
SR+MA
Vardenafil (Levitra) · NCBI Bookshelf NBK71066
Vardenafil for erectile dysfunction: systematic review and meta-analysis of clinical trial reports
Comprehensive NICE-style technology assessment aggregating multiple RCTs. IIEF-EF improvements consistent across populations and doses.
NCBI
Review
2012
Vardenafil orodispersible tablet — clinical overview
Peer-reviewed overview of the ODT formulation mechanics and clinical behavior. Useful context for Epiq Chew delivery claims.
PubMed
REG
FDA · 2003 · NDA 21-400 medical review
FDA reviewer's assessment: vardenafil 5, 10, 20 mg doses are clinically and statistically superior to placebo
The original FDA medical review. Regulatory-grade source for dose-efficacy claims across all three approved tiers, including the 5 mg dose used in Epiq Chew.
FDA
RCT
PMC3090379 · Pooled POTENT
Orally disintegrating vardenafil tablets for ED: efficacy, safety, and patient acceptability
Pooled analysis of POTENT I + II across age and race subgroups. Confirms consistent ODT performance.
PMC
Bremelanotide
5 mg · 10 mg

Bremelanotide

MC4R Agonist · Peptide

Melanocortin MC4R agonist peptide studied for central arousal signaling in the hypothalamus. FDA-approved (Vyleesi) for hypoactive sexual desire disorder in premenopausal women. Erectile-dysfunction data exists at Phase 2 only — not an approved indication.

Full transparency on bremelanotide

Bremelanotide's FDA approval is for hypoactive sexual desire disorder in premenopausal women — not for erectile dysfunction. The ED evidence base in men is Phase 2 (not Phase 3 / approved). We include it in our combination formulas because the mechanism — central arousal signal via MC4R — complements the vascular mechanism of PDE5 inhibitors, and because Phase 2 data in sildenafil-nonresponders is promising. But we won't claim FDA approval for ED, because it doesn't exist yet. That's why it's prescription-only and compounded under provider review.

RCT
2019 · Obstet Gynecol
Bremelanotide for the treatment of hypoactive sexual desire disorder: two randomized Phase 3 trials (RECONNECT)
The two pivotal Phase 3 RECONNECT trials that supported FDA approval of Vyleesi (1.75 mg subcutaneous) for HSDD in premenopausal women. Significant improvements on FSFI-D and FSDS-DAO vs placebo.
PubMed
RCT
2019
Long-term safety and efficacy of bremelanotide for hypoactive sexual desire disorder
52-week open-label extension of RECONNECT. Confirms sustained efficacy and a stable safety profile across a full year of treatment.
PubMed
REG
2019 · Drugs
Bremelanotide: first approval
Peer-reviewed drug-approval summary covering the 2019 FDA approval, MC4R pharmacology, and regulatory path.
PubMed
MECH
2021
The neurobiology of bremelanotide for HSDD in premenopausal women
Mechanism-of-action review: MC4R activation in the hypothalamic medial preoptic area as the basis for central arousal signal.
PubMed
RCT
2008 · J Urol
Salvage of sildenafil failures with bremelanotide
Phase 2 RCT in men who failed sildenafil therapy. Bremelanotide produced clinically meaningful IIEF-EF improvements. The anchor ED-in-men citation, with the Phase 2 caveat.
AUA
MECH
PMC2694735
Melanocortin receptors, melanotropic peptides and penile erection
Historical mechanism paper covering the PT-141 program, pre-clinical and early-human penile-erection studies. Foundation for the central-arousal thesis.
PMC
REG
FDA · 2019 · NDA 210557
Vyleesi (bremelanotide) official FDA label and prescribing information
Regulatory document. Authoritative for approved indication (HSDD, premenopausal women, 1.75 mg SC), dose, warnings, and clinical pharmacology.
FDA
Apomorphine
2 mg · 4 mg

Apomorphine

D1/D2 Dopamine Agonist
Used in Ignite 2 Ignite 4

Dopaminergic agonist. Centrally activates D1/D2 pathways implicated in sexual response and arousal. Sublingual apomorphine (Uprima / Ixense) was approved in the EU and ran a substantial Phase II/III RCT program in the early 2000s.

Market history — full context

Sublingual apomorphine (Uprima / Ixense) was approved in the EU and withdrawn from most markets in the mid-2000s — primarily due to nausea/emesis rates at effective doses, not safety signals in the cardiovascular sense. It was never approved in the US. We include it at sub-emetic 2 mg / 4 mg doses in Ignite formulas under provider Rx review, paired with PDE5 inhibitors so the central-arousal benefit doesn't have to come from apomorphine alone. Read the RCT literature below with this context.

RCT
2000 · Apomorphine Study Group
Efficacy and safety of fixed-dose and dose-optimization regimens of sublingual apomorphine vs placebo in men with ED
Pivotal RCT establishing sublingual apomorphine efficacy. Dose-optimization improved response rates; IIEF-EF gains vs placebo.
PubMed
RCT
2001
Double-blind, crossover comparison of 3 mg apomorphine SL with placebo and with 4 mg apomorphine SL
Crossover RCT — 3 mg and 4 mg both superior to placebo; 4 mg numerically stronger on response metrics. Anchors the 2 / 4 mg dose-tier framing used in Ignite.
PubMed
Review
2002
Oral treatment of erectile dysfunction with apomorphine SL
Detailed review of the Phase II/III program. Consolidates IIEF improvements across multiple trials and summarizes the approved-in-EU label era.
PubMed
RCT
2004
Prospective randomized crossover comparison of sublingual apomorphine 3 mg with oral sildenafil 50 mg for male ED
Head-to-head RCT. Sildenafil produced greater IIEF improvement, but apomorphine remained significantly superior to placebo — supports combination use rather than replacement.
PubMed
Review
2000
Apomorphine: an update of clinical trial results
Phase III data summary covering success rates, safety profile, and the emetic-threshold considerations that shaped the dose strategy.
PubMed
MECH
2001
Dopamine and male sexual function
Mechanism review covering the D1/D2 pathway and central regulation of erection. Anchor paper for framing apomorphine's mode of action.
PubMed
Pycnogenol
25 mg · 50 mg

Pycnogenol

French Maritime Pine Bark · Polyphenol

Standardized maritime-pine-bark polyphenol. Supports nitric oxide production and vascular tone; the strongest ED evidence is as a synergist with L-arginine (the Prelox combination).

SR+MA
2023 · Aging Male (PMID 37908749)
Efficacy of L-arginine and Pycnogenol in the treatment of male ED: systematic review and meta-analysis
Most recent high-tier evidence synthesis. Significant pooled improvement in IIEF-EF with the combination vs placebo. 3 RCTs, 184 patients.
PubMed
RCT
2003
Treatment of erectile dysfunction with pycnogenol and L-arginine
Foundational 3-month open trial demonstrating restoration of normal erectile function in men with mild-to-moderate ED using the combination.
PubMed
RCT
2010
Investigation of a complex plant extract for mild to moderate ED: RCT double-blind placebo-controlled parallel-arm study
6-month RCT tracking IIEF and testosterone. Significant improvements in erectile function scores.
PubMed
RCT
2012
Effects of Pycnogenol on endothelial function in patients with stable coronary artery disease: double-blind RCT crossover
Gold-standard crossover RCT. Significant improvement in flow-mediated dilation — the vascular-mechanism citation.
PubMed
SR+MA
2019
Effects of pycnogenol on cardiometabolic health: systematic review and meta-analysis of RCTs
Meta-analysis across blood pressure, glucose, and lipid endpoints. Supports broader cardiometabolic positioning.
PubMed
RCT
2008 · Int J Impot Res (PMID 17703218)
Improvement of erectile function with Prelox: randomized double-blind placebo-controlled crossover trial
Crossover RCT. 1-month Pycnogenol + L-arginine restored erectile function to normal; intercourse frequency doubled. e-NOS in spermatozoa and blood testosterone rose significantly.
PubMed
RCT
PMC5198833
Pycnogenol + L-arginine aspartate on lower urinary dysfunction compared with saw palmetto extract
Comparative assessment in Japanese patients. Supports adjacent urinary-function framing for the combination.
PMC
SR
PMC8451697 · Alternative medicine SR
Alternative medicine and herbal remedies in the treatment of erectile dysfunction: a systematic review
Broader SR contextualizing pycnogenol within botanical-ED evidence. Indexes the Stanislavov and Ledda work among the strongest-tier entries.
PMC
L-Citrulline
50 mg

L-Citrulline

Amino Acid · NO Precursor
Used in Boost

Converts to L-arginine → nitric oxide. Raises plasma L-arginine more efficiently than oral L-arginine itself. A component in the Boost preworkout stack for vascular priming.

Dose transparency — read carefully

Most published L-citrulline RCTs use 1.5–10 g per day. Our Boost formula uses 50 mg — roughly 30–200× lower than the clinical trial doses. The studies below describe what L-citrulline can do at clinically studied doses. Our formula does not deliver those doses. In Boost, L-citrulline is a nitric-oxide cofactor addition; the erectile-function work is done by tadalafil, not L-citrulline at this level.

RCT
2011
Oral L-citrulline supplementation improves erection hardness in men with mild ED
Pilot RCT at 1.5 g/day. Modest but significant improvement in erection hardness. The foundational ED-specific citation for L-citrulline.
PubMed
PK
2008 · PMC2291275
Pharmacokinetic and pharmacodynamic properties of oral L-citrulline and L-arginine: impact on nitric oxide metabolism
Foundational PK paper. L-citrulline raises plasma L-arginine more effectively than oral L-arginine itself — the mechanism citation for the NO-precursor claim.
PMC
RCT
TTU
Effects of L-citrulline supplementation on endothelial function and blood pressure in hypertensive postmenopausal women
RCT at 10 g. Flow-mediated dilation improved vs placebo. Demonstrates the endothelial mechanism at a higher study dose.
TTU
RCT
2016 · J Int Soc Sports Nutr
Oral L-citrulline supplementation enhances cycling time-trial performance in healthy trained men
Double-blind RCT at 2.4 g. 4-km cycling time-trial performance improved — supports the ergogenic framing for preworkout positioning.
PDF
RCT
2019 · PMC6469824
Oral L-citrulline + L-arginine improves 10-min full-power cycling in collegiate soccer players
Randomized crossover RCT showing synergy between citrulline and arginine for sustained high-intensity output.
PMC
RCT
TTU · Microvascular RCT
L-citrulline supplementation improves microvascular function and strength in diabetic patients
RCT in diabetic population. Microvascular endpoints improved vs placebo — extends vascular-mechanism claim into a metabolic-disease cohort.
TTU
Review
PMC10005484 · Narrative review
Dietary arginine and citrulline supplements for cardiovascular health and athletic performance
Narrative synthesis of effective dosages for CV and athletic-performance endpoints. Useful for dose framing and mechanism overview.
PMC
Caffeine
55 mg

Caffeine

CNS Stimulant · Xanthine
Used in Boost

Adenosine receptor antagonist — the most-studied legal ergogenic compound. Evidence is overwhelming for alertness and exercise performance; ED evidence is observational only.

Honest caveat on the ED signal

The NHANES ED observation is observational, not randomized. A Mendelian randomization analysis found no confirmed causal link between caffeine intake and ED. We include caffeine in Boost because it's a proven ergogenic and cognitive stimulant — not because it treats ED. The ED claim in Boost belongs to tadalafil.

Consensus
2021 · ISSN Position Stand
International Society of Sports Nutrition Position Stand: caffeine and exercise performance
Definitive expert-consensus document covering dose-response, timing, form (anhydrous vs coffee), and endurance vs strength endpoints.
PDF
SR+MA
PMC8000732
Caffeine and cognitive functions in sports: systematic review and meta-analysis
Systematic review. Attention, reaction time, and accuracy improved; dose- and modality-specific effects detailed.
PMC
RCT
2024 RCT · PubMed 39231871
Effects of different doses of caffeine on cognitive performance in healthy physically active individuals
Dose-response RCT on reaction time and cognitive endpoints.
PubMed
RCT
NCT06693505 · ClinicalTrials.gov
Cognitive performance following caffeinated chewing gum in night-shift emergency physicians: double-blind crossover
Randomized crossover trial on alertness and working memory in sleep-deprived professionals — supports the sublingual-delivery framing.
Trial
OBS
2015
Role of caffeine intake on erectile dysfunction in US men: NHANES 2001–2004
Observational analysis. Higher caffeine quintiles associated with lower ED prevalence — correlation only, not causation.
PubMed
MA
PMC11439322 · Cohort MA
Association between caffeine intake and erectile dysfunction: meta-analysis of cohort studies
Meta-analysis of ~51,665 cohort members. Modest inverse association — useful context but not efficacy-level evidence.
PMC
MECH
2006
Adenosine A1-A2A receptor heteromers: new targets for caffeine in the brain
Mechanism-of-action paper. Establishes the molecular basis for caffeine's central stimulant effects.
PubMed
NMN
50 mg

NMN

NAD+ Precursor · Nicotinamide Mononucleotide
Used in Cruise Control

A direct precursor to NAD+. Converts intracellularly to support mitochondrial energy production and sirtuin-pathway activity. Human-RCT evidence emerged 2021–2023.

Two honest caveats — read carefully

(1) Dose. Most published NMN RCTs use 250–900 mg. Our Cruise Control dose is 50 mg — roughly 5–18× lower than clinical trial doses. The studies below describe what NMN can do at clinically studied doses. Our formula does not deliver those doses. At 50 mg, NMN is a mechanism-of-action inclusion (NAD+ precursor support), not efficacy-equivalent to published trials. (2) Regulatory status. As of 2022, the FDA has taken the position that NMN is excluded from the "dietary supplement" definition because it is being investigated as a drug. Inclusion in our formula is under provider Rx review.

RCT
2023
Efficacy and safety of β-NMN supplementation in healthy middle-aged adults: multicenter double-blind dose-dependent RCT
The largest-to-date dose-dependent NMN trial in healthy middle-aged adults. Establishes dose-response for physical performance endpoints.
PubMed
RCT
2022
Effect of 12-week intake of NMN on sleep quality, fatigue, and physical performance in older Japanese adults
RCT in older adults. Improvements in sleep-quality metrics, fatigue, and select physical-performance measures.
PubMed
RCT
2022
Chronic NMN supplementation elevates blood NAD+ levels and alters muscle function in healthy older men
RCT demonstrating NAD+ elevation and effects on gait speed in healthy older men.
PubMed
RCT
2021 · PMC8550608
Nicotinamide mononucleotide increases muscle insulin sensitivity in prediabetic women
Washington U. RCT. Skeletal-muscle insulin sensitivity improved in prediabetic women. Supports the metabolic framing.
PMC
RCT
2022
Effects of NMN on older patients with diabetes and impaired physical performance: prospective placebo-controlled RCT
RCT in a diabetic older-adult population with impaired physical performance. Supports the physical-performance claim in a metabolically-compromised cohort.
PubMed
PK
2020 · Endocr J (PMID 31685720)
Effect of oral NMN on clinical parameters and nicotinamide metabolite levels in healthy Japanese men
First human PK/safety trial for single-dose oral NMN (100, 250, 500 mg). Establishes the absorption and metabolite-conversion pathway in humans. Keio University.
PubMed
Review
PMC11473484 · NMN comprehensive review
The versatile multi-functional substance NMN: characteristics, metabolic properties, pharmacodynamic effects, clinical trials, and applications
Comprehensive review aggregating the full human NMN-trial landscape. Useful for landscape orientation and dose context.
PMC
NAD+
1300 mg · 200 mg/mL · 100 mg/mL

NAD+

Redox Coenzyme · Nicotinamide Adenine Dinucleotide

The redox coenzyme central to mitochondrial energy production, DNA repair, and sirtuin activation. Levels decline with age; supplementation aims to restore cellular reserves.

Precursor vs direct delivery — full context

Most Tier-1 human evidence for NAD+ uses oral precursors (nicotinamide riboside / NR, NMN) showing reliable blood NAD+ elevation. Direct NAD+ delivery via injection, intranasal, or transdermal patch has far less RCT evidence — mostly pilot studies and retrospective tolerability reports. The precursor mechanism and clinical outcomes are well-characterized; the direct-delivery products are positioned as compounded alternatives, with the caveat that head-to-head efficacy vs precursors has not been established.

RCT
2017 · MIT DSpace
Repeat-dose NRPT (nicotinamide riboside + pterostilbene) safely increases NAD+ levels in humans
Dose-dependent, placebo-controlled. Blood NAD+ elevation confirmed safely in healthy adults. The anchor citation for NAD+-elevation claims.
MIT
RCT
2019
Nicotinamide riboside augments the aged human skeletal muscle NAD+ metabolome and induces transcriptomic and anti-inflammatory signatures
RCT in older men. NR elevated skeletal-muscle NAD+ metabolome and produced anti-inflammatory transcriptomic shifts.
PubMed
RCT
2020
Nicotinamide riboside alters body composition and skeletal muscle acetylcarnitine concentrations in healthy obese humans
RCT. NR produced shifts in muscle acetylcarnitine — a marker of improved mitochondrial fuel use.
PubMed
RCT
2024 · PMC10828186
Randomized placebo-controlled trial of nicotinamide riboside in older adults with mild cognitive impairment
RCT in MCI population. Early evidence for a cognitive-aging benefit of NAD+ precursor supplementation.
PMC
Pilot
PMC6751327 · Pilot IV NAD+ PK
Pilot study investigating changes in the human plasma and urine NAD+ metabolome during a 6-hour intravenous infusion of NAD+
The foundational pilot study for IV NAD+ in humans. Quantifies infusion kinetics and metabolite distribution.
PMC
OBS
PMC12907335 · Retrospective tolerability
Intravenous infusion of NAD+ vs nicotinamide riboside: retrospective tolerability pilot in a real-world setting
Retrospective tolerability comparison. Real-world safety signal for IV NAD+ — not efficacy-grade, but informative for clinical deployment.
PMC
RCT
NCT03151239 · ClinicalTrials.gov
Effect of nicotinamide mononucleotide (NMN) on cardiometabolic function
Registered clinical trial targeting cardiometabolic endpoints. Referenced here for the broader NAD+ precursor program.
Trial
Glutathione
500 mg · 200 mg · 200 mg/mL · 100 mg/mL

Glutathione

Tripeptide Antioxidant · GSH

The body's master intracellular antioxidant. RCT evidence spans liver function, oxidative stress, immune markers, and — uniquely for the nasal route — Parkinson's disease.

RCT
2015
Randomized controlled trial of oral glutathione supplementation on body stores of glutathione
Anchor RCT. Demonstrates dose-dependent increases in whole-body glutathione stores with sustained oral supplementation.
PubMed
RCT
2017
Oral supplementation with liposomal glutathione elevates body stores of glutathione and markers of immune function
RCT demonstrating natural-killer-cell activity increases alongside glutathione elevation.
PubMed
Pilot
2017 · BMC Gastroenterol (PMID 28789631)
Efficacy of glutathione for the treatment of NAFLD: open-label single-arm multicenter pilot
34 NAFLD patients given 300 mg/day oral glutathione for 4 months. ALT, triglycerides, NEFA, and ferritin all decreased. Preliminary but directly on-mechanism.
PubMed
RCT
PMC11806808 · HBV RCT
Therapeutic effects of reduced glutathione on liver function, fibrosis, and HBV DNA clearance in chronic hepatitis B
Clinical RCT combining glutathione with antiviral therapy. Improvements in liver function and fibrosis markers vs standard-of-care alone.
PMC
RCT
2015 · PMC4609266
Randomized double-blind Phase I/IIa study of intranasal glutathione in Parkinson's disease
The key citation supporting the intranasal delivery route. Safety and dose-finding data for intranasal glutathione.
PMC
RCT
2021
Oral L-cystine + reduced L-glutathione on human skin pigmentation: randomized double-blinded benchmark- and placebo-controlled RCT
RCT evidence for skin-pigmentation reduction — supports the skin-clarity framing on the patch and capsule.
PubMed
RCT
PMID 41754089 · HIV/TB RCT
Efficacy and safety of glutathione supplementation in patients with HIV infection and HIV-TB co-infection
RCT evidence for redox repletion and safety in immunocompromised populations.
PubMed
GHK-Cu
10 mg

GHK-Cu

Copper Tripeptide · Glycyl-L-histidyl-L-lysine

A naturally-occurring copper-binding tripeptide studied for its role in tissue repair, wound healing, and skin signaling. Its evidence base is deep in mechanism (gene expression, collagen synthesis, in-vitro and animal studies) but thin in large human RCTs. We want you to see this clearly before reading the citations.

This one needs the biggest caveat on the page

GHK-Cu has robust mechanistic evidence — in vitro (fibroblast glycosaminoglycan synthesis), animal models (wound healing, connective tissue accumulation), and gene-modulation analyses. What it does not have is large, modern, human RCT evidence for the specific claim of "transdermal 10 mg patch improves outcome X." We include GHK-Cu in our patches for the well-characterized mechanism and because the peptide has a long, benign safety record in topical use. We are not claiming it alone reverses aging, regrows hair, or remodels skin at a population level — those would require trials that haven't been run at this dose or delivery form. Read the citations below with that frame.

MECH
PMC288419
In vivo stimulation of connective tissue accumulation by the tripeptide-copper complex GHK-Cu in rat experimental wounds
Foundational animal study. Copper-bound tripeptide stimulated collagen and elastin accumulation in wound-healing tissue.
PMC
MECH
1992
Stimulation of sulfated glycosaminoglycan synthesis by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+
In vitro dose-dependent stimulation of glycosaminoglycan synthesis in fibroblasts. The molecular basis for skin-remodeling claims.
PubMed
Pharm
2016
Physicochemical characterization of native GHK tripeptide for wound healing and anti-aging: preformulation study for dermal delivery
Pharmaceutical-grade characterization and stability data supporting dermal/transdermal delivery formats.
PubMed
MECH
PMC5295439 · Anti-inflammatory MECH
The tri-peptide GHK-Cu complex ameliorates LPS-induced acute lung injury in mice
Animal mechanism study. NF-κB and MAPK pathway modulation supports the anti-inflammatory framing.
PMC
Review
2015 · Biomed Res Int (PMID 26236730)
GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration
Comprehensive mechanism review covering GHK's role in collagen synthesis, glycosaminoglycan regulation, and the TGF-β signaling pathway. Mechanism reference only; no RCT.
PubMed
Review
2018 · OBM Geriatrics
The effect of the human plasma molecule GHK-Cu on stem cell actions and expression of relevant genes
Review of GHK-Cu influence on stem-cell behavior and gene expression.
PDF
Review
2018 · Oxid Med Cell Longev (PMID 29986520)
Regenerative and protective actions of the GHK-Cu peptide in light of new gene data
Contemporary review summarizing transcriptomic studies of GHK-Cu — anti-inflammatory actions, DNA repair, and gene-expression patterns relevant to tissue regeneration.
PubMed
Methionine
Lipolean MIC/B12

Methionine

Essential Amino Acid · Methyl Donor
Used in Lipolean

Essential amino acid, a methyl donor for hepatic one-carbon metabolism. Part of the classic Methionine-Inositol-Choline ("MIC") lipotropic injection.

Honest about "lipotropic injections"

There are no large Tier-1 RCTs proving that MIC ("lipotropic") injections produce weight loss as a standalone intervention. This is a well-known evidence gap. Individual components (methionine, inositol, choline) have endpoint-specific evidence — liver function, lipid metabolism, homocysteine — but the combination injection has been used clinically far longer than it has been studied rigorously. We prescribe Lipolean for energy support and metabolic cofactor repletion, not as a standalone weight-loss therapy. The studies below cover individual methionine endpoints.

RCT
SciELO · Methionine nutrition therapy
Efficacy of nutrition therapy with food rich in methionine for treating nonalcoholic fatty liver
RCT of methionine-rich nutrition intervention in NAFLD. Improvements in hepatic ultrasound and ALT/AST.
SciELO
RCT
1998 · Circulation
Hyperhomocysteinemia after an oral methionine load acutely impairs endothelial function in healthy adults
Cautionary trial. Acute methionine loading raises homocysteine and impairs endothelial function. We include this because it's a counterbalance — methionine dosing must be paired with methylation cofactors (B12, folate, choline) to avoid homocysteine spikes.
AHA
Inositol
Lipolean MIC/B12

Inositol

Sugar Alcohol · Cell Signaling
Used in Lipolean

A vitamin-like cell-signaling molecule. The strongest Tier-1 evidence is in women's health (PCOS, ovulation, insulin resistance) and psychiatric (anxiety, OCD). The insulin-sensitivity and mood mechanisms are relevant to men as well.

SR+MA
PMC11099481 · 2023 PCOS Guidelines review
Inositol for polycystic ovary syndrome: systematic review and meta-analysis to inform the 2023 International Evidence-based PCOS Guidelines
High-level SR informing the international PCOS guideline update. Metabolic and reproductive outcomes favor inositol vs placebo.
PMC
MA
2017 · Endocr Connect
Myo-inositol effects in women with PCOS: meta-analysis of randomized controlled trials
Meta-analysis. Significant reductions in fasting insulin and androgens. Anchor citation for the insulin-sensitizing claim.
PDF
RCT
European Review for Med & Pharma Sci
The 40:1 myo-inositol / D-chiro-inositol plasma ratio restores ovulation in PCOS patients
RCT comparing different myo:DCI ratios. Establishes 40:1 as optimal — informs any combination formulation containing both isomers.
PDF
RCT
1995
Double-blind crossover trial of inositol vs fluvoxamine for the treatment of panic disorder
RCT head-to-head against an SSRI. Comparable efficacy with different tolerability profile. Anchor citation for the mood-anxiety claim.
PubMed
Review
1997
Controlled trials of inositol in psychiatry
Review of classic RCTs establishing therapeutic doses for depression, OCD, and panic disorder.
PubMed
RCT
2017
Myo-inositol vs metformin on mental health and oxidative stress in PCOS: randomized double-blind placebo-controlled trial
RCT head-to-head with metformin on depression scores and oxidative stress markers.
PubMed
SR+MA
PMC9159559 · BMI SR+MA
Inositol supplementation and body mass index: systematic review and meta-analysis of RCTs
Meta-analysis of BMI reductions with inositol supplementation. Modest but significant effect across trials.
PMC
SR+MA
2018 · Lipids Health Dis (PMID 29793496)
The effects of inositol supplementation on lipid profiles among patients with metabolic diseases: SR + meta-analysis of RCTs
Meta-analysis of 14 RCTs. Inositol supplementation reduces triglycerides, total cholesterol, and LDL; no effect on HDL.
PubMed
Choline Chloride
Lipolean MIC/B12

Choline Chloride

Lipid Metabolism · Acetylcholine Precursor
Used in Lipolean

A quaternary ammonium salt classified as an essential nutrient. Precursor to acetylcholine and phosphatidylcholine. Core to hepatic VLDL export and liver fat metabolism — the strongest rationale for MIC injection.

RCT
2025 · PubMed 40838115
The impact of choline supplementation on oxidative stress and clinical outcomes among patients with NAFLD: randomized controlled study
Most recent RCT. 12-week supplementation improved oxidative-stress markers and clinical outcomes in NAFLD.
PubMed
RCT
2001
Choline deficiency causes reversible hepatic abnormalities in patients receiving parenteral nutrition: placebo-controlled proof of a human choline requirement
Placebo-controlled trial demonstrating that 2 g oral choline chloride reversed parenteral-nutrition-induced hepatic steatosis. Proof-of-mechanism for the lipotropic claim.
PubMed
OBS
PubMed 34745383 · US NHANES
Choline intake correlates with cognitive performance among elder adults in the United States
Large observational study. Dose-response correlation between choline intake and cognitive measures. Informs the cognitive-aging framing.
PubMed
SR+MA
PubMed 41426989
Comparison of choline alphoscerate and citicoline in patients with dementia disorders: systematic review and meta-analysis
Meta-analysis of pharmaceutical-grade choline forms in dementia. Relevant context for the cognitive framing.
PubMed
Review
2016
Pathways of acetylcholine synthesis, transport and release as targets for treatment of adult-onset cognitive dysfunction
Mechanism review covering the acetylcholine synthesis pathway and the limitations of precursor supplementation.
PubMed
RCT
2005 · Am J Clin Nutr (PMID 15699233)
Choline deficiency in mice and humans is associated with increased plasma homocysteine after a methionine load
Human depletion-repletion study (n=8). Choline-depleted men showed 35% higher homocysteine post-methionine-load vs choline-sufficient. Supports the rationale for combining choline with methionine in MIC formulations.
PubMed
PK
PMC8783899 · Choline PK
Differential metabolism of choline supplements in adult volunteers
RCT comparing 550 mg doses of four choline forms. Kinetic and metabolic-fate differences inform formulation choice.
PMC
Review
PMC10025538 · Choline supplements update
Choline supplements: an update
Current review tabulating trial results across choline formulations and outcomes.
PMC
Vitamin B12
Injectable

Vitamin B12 · Cyanocobalamin

Water-Soluble B Vitamin · Cobalamin

Water-soluble B vitamin essential for red-blood-cell formation, neurological function, and energy metabolism. The injection-vs-oral route comparison is well-characterized in Tier-1 literature.

Network MA
PubMed 38231320 · 2024 Network MA
Efficacy of different routes of vitamin B12 supplementation for the treatment of patients with vitamin B12 deficiency: systematic review and network meta-analysis
2024 network meta-analysis of 13 studies comparing oral, intramuscular, and sublingual B12. The most current high-tier synthesis.
PubMed
SR+MA
PMC12757266 · SR+MA, 16 studies
Efficacy of sublingual and oral vitamin B12 vs intramuscular administration: insights from a systematic review and meta-analysis
Analysis of 6,098 patients across 16 studies. Outcomes for serum cobalamin and homocysteine normalization.
PMC
SR
PubMed 16585128
Oral vitamin B12 vs intramuscular vitamin B12 for vitamin B12 deficiency: systematic review of RCTs
Foundational systematic review. 2000 mcg oral daily achieves hematologic and neurological response comparable to IM.
PubMed
RCT
Frontiers fmed.2016.00038
Oral vitamin B12 replacement for the treatment of pernicious anemia
Clinical evidence for cognitive-function improvement in pernicious anemia patients treated with 1000 mcg oral B12.
Frontiers
RCT
Anticancer Research · Phase II RCT
Phase II multicenter RCT evaluating oral vitamin B12 treatment after total gastrectomy in gastric cancer patients
Randomized phase II comparing 500 mcg vs 1500 mcg oral doses post-gastrectomy. Informs dosing in malabsorptive states.
PDF
RCT
Korean J Pain · 500 mcg vs 1500 mcg
Randomized study comparing serum cobalamin after three doses of 500 mcg vs a single dose of 1500 mcg methylcobalamin
RCT directly comparing injectable-B12 dosing strategies in peripheral neuropathy patients.
J Pain
Review
PMC6210286 · GI Disorders SR
Systematic review and pragmatic clinical approach to oral and nasal vitamin B12 treatment in patients with B12 deficiency related to gastrointestinal disorders
2018 review with a clinical decision framework for choosing B12 route in GI-compromised patients.
PMC
Review
AAFP FPIN · 2022
FPIN's Clinical Inquiries: vitamin B12 dosing in patients over 65
Family-physician clinical inquiry synthesizing comparative data from Turkish and Spanish trials. Useful for dosing in older adults.
AAFP
Vitamin D3
200 IU

Vitamin D3 · Cholecalciferol

Fat-Soluble Vitamin · Seco-steroid
Used in Epiq Chew

Fat-soluble vitamin acting as a seco-steroid hormone. One of the most RCT-studied supplements in medicine, with Tier-1 evidence spanning testosterone, bone density, mortality, and respiratory-infection prevention.

Dose transparency — read carefully

Most Tier-1 Vitamin D RCTs use 1,000–5,000 IU daily. Our Epiq Chew dose is 200 IU — roughly 5–25× lower than the doses in the trials cited below. At 200 IU, Vitamin D3 in Epiq Chew should be understood as a K2 cofactor pairing (K2 routes calcium; D3 supports its absorption), not as a therapeutic or deficiency-replacement dose. The studies below describe what Vitamin D3 can do at clinically studied doses — our formula does not deliver those doses. If your 25(OH)D is low, ask your provider about a dedicated vitamin-D protocol.

MA
2019 · BMJ 366
Association between vitamin D supplementation and mortality: systematic review and meta-analysis
Marquee BMJ meta-analysis examining all-cause, cardiovascular, and cancer mortality endpoints. The anchor citation for mortality-risk framing.
BMJ
RCT
2017 · PMC6842386
Effects of vitamin D supplementation on androgens in men with low testosterone levels: randomized controlled trial
Primary RCT evaluating vitamin D effect on total testosterone in men. The anchor citation for the testosterone-in-men claim.
PMC
RCT
2011
Effect of vitamin D supplementation on testosterone levels in men
Earlier RCT showing potential increases in total, bioactive, and free testosterone. Preliminary but complements the 2017 Lerchbaum RCT.
PubMed
SR+MA
Lancet
Effects of vitamin D supplements on bone mineral density: systematic review and meta-analysis
Lancet-published SR+MA focused on BMD. Reference citation for bone-health claims.
PDF
SR+MA
PubMed 37111028
Vitamin D supplementation and its impact on mortality and cardiovascular outcomes: systematic review and meta-analysis of 80 randomized clinical trials
Very large synthesis covering 80 RCTs. Mortality and cardiovascular endpoints.
PubMed
RCT
2019 · VITAL
Vitamin D and Omega-3 Trial (VITAL): primary cardiovascular and cancer prevention
Landmark NEJM RCT. Large-scale primary-prevention trial with informative bone and non-bone sub-study results.
ACC
MA
IPD MA
Vitamin D supplementation to prevent acute respiratory tract infections: individual participant data meta-analysis
Individual participant data meta-analysis. Supports the respiratory-infection-prevention claim.
PDF
Vitamin K2
1 mg

Vitamin K2 · Menaquinone

Fat-Soluble Vitamin · MK-4 / MK-7
Used in Epiq Chew

The calcium-routing vitamin. Activates matrix-Gla protein and osteocalcin to direct calcium into bone and away from arterial walls. Pairs naturally with D3 for the bone-and-cardiovascular axis.

MA
2022
Efficacy and safety of vitamin K2 for postmenopausal women with osteoporosis at long-term follow-up: meta-analysis and systematic review
Meta-analysis of 9 RCTs (6,853 postmenopausal women). Vitamin K2 significantly increased lumbar and forearm BMD, reduced undercarboxylated osteocalcin. No serious adverse events. Anchor citation for the K2 bone claim.
PubMed
RCT
2013
Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women
Three-year RCT demonstrating MK-7 efficacy in preventing bone loss.
PubMed
RCT
2022 · Circulation
Vitamin K2 and D in patients with aortic valve calcification: randomized double-blinded clinical trial
Multicenter RCT investigating MK-7's impact on aortic valve calcification. High-tier CV-calcification evidence.
AHA
RCT
PubMed 32060566 · Chinese RCT
Effect of low-dose vitamin K2 supplementation on bone mineral density in middle-aged and elderly Chinese: RCT
RCT comparing MK-7 alone with MK-7 + D3 + calcium. Informs the K2/D3 pairing strategy.
PubMed
RCT
2020 · K4Kidneys
Vitamin K supplementation to improve vascular stiffness in CKD: the K4Kidneys randomized controlled trial
RCT measuring vascular stiffness in CKD patients. Supports the arterial-health framing beyond osteoporosis.
PubMed
RCT
WashU · MK-4 Dose Response
Maximal dose-response of vitamin K2 (menaquinone-4) on undercarboxylated osteocalcin in women with osteoporosis
Dose-response study from 0.5 to 45 mg MK-4. Informs the dose-saturation point for osteocalcin carboxylation.
WashU
PK
2012
Comparison of menaquinone-4 and menaquinone-7 bioavailability in healthy women
Direct PK comparison between MK-4 and MK-7. Informs formulation choice for menaquinone products.
PubMed
RCT
2015
Effect of vitamin K2 on progression of atherosclerosis and vascular calcification in nondialyzed patients with CKD stages 3-5
RCT on carotid intima-media thickness in CKD. MK-7 slowed progression.
PubMed
SR+MA
PubMed 38046003
Vitamin K supplementation impact in dialysis patients: systematic review and meta-analysis of randomized trials
Meta-analysis covering mortality and calcification-score outcomes in dialysis populations.
PubMed