For research & informational purposes only.  Nothing on this site is medical advice or a recommendation to use any compound.
Educational Reference

Understanding Peptides
Through the Evidence

A plain-language reference on the compounds people are talking about. What each one is, how it works, what the research actually shows, and where it stands with regulators. No hype, no sales.

The Library

Eleven Compounds, Examined

Approved Medicine

Tirzepatide

GIP / GLP-1 dual agonist

The most evidenced compound here. Approved for type 2 diabetes and weight management, with large phase 3 trials behind it.

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Approved Medicine

Tesamorelin

Growth hormone-releasing hormone (GHRH) analog

The only FDA-approved GHRH analog. Strong phase 3 evidence for reducing visceral fat in a defined patient population.

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In Clinical Trials

Retatrutide

GIP / GLP-1 / glucagon triple agonist

An investigational triple agonist showing the largest weight reductions yet seen in peptide trials. Not yet approved anywhere.

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In Clinical Trials

SS-31

Mitochondria-targeted tetrapeptide (Elamipretide)

Genuine phase 2/3 human trial data across several rare diseases, with mixed results. Not yet approved for any condition.

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Research Only

MOTS-c

Mitochondrial-derived peptide

A naturally occurring peptide studied for its role in metabolism and exercise. Human therapeutic data is very limited.

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Research Only

BPC-157 & TB-500

Tissue-repair research peptides · "Wolverine Stack"

Popular in recovery circles, but the evidence is almost entirely from animal studies. Banned in sport and not approved for human use.

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Precursor / Supplement

NAD+

Coenzyme & precursors (NMN, NR)

A coenzyme central to cellular energy. Supplements reliably raise blood levels, but functional benefits in humans remain mixed.

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Research Only

Epitalon

Telomerase-activating tetrapeptide

An interesting mechanism with cell and animal support, but independently verified human evidence is essentially absent.

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Topical / Cosmetic

GHK-Cu

Copper tripeptide

The best-studied compound here for skin. Topical trials show measurable collagen and firmness gains. Widely used in cosmetics.

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Research Only

KLOW

GHK-Cu + BPC-157 + TB-500 + KPV

A four-peptide research blend. No trials exist on the combination itself, only on its individual parts.

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Research Only

GLOW

GHK-Cu + BPC-157 + TB-500

A three-peptide research blend marketed for recovery and skin. As with KLOW, the blend itself is untested.

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How to read this library

Evidence first, claims second

Each compound is graded on the strength of its human evidence and labelled with its regulatory status. A compound being popular is not the same as a compound being proven. Where the research is thin or limited to animals, the page says so plainly. Start with About Peptides if the terms are new to you.