Every peptide,
evidence first.

Peptides are fundamentally changing medicine. We publish the clearest, most current reference on what works, what’s promising, and what’s still hype, organized by goal and rated by evidence.

Browse the catalog How we rate evidence

124 compounds · 12 goal categories · Updated weekly

A four-tier evidence scale. The reasoning on every page.

Nothing on this site is ranked by how trendy it is. We classify each compound by where it sits in the evidence hierarchy, and show you why.

124

Compounds researched

Across 12 goal categories

Established

FDA approved for ≥1 indication

Clinical

In Phase 2/3 human trials

Preclinical

Animal & mechanistic data

Experimental

Hypothesis-stage claims

What are you trying to do?

Every peptide is organized by what it actually does, not by trade name, not by marketing category. Pick a goal and start there.

01GLP-1 & IncretinThe class rewriting metabolic medicine.13 peptides 02Growth HormoneGHRH and GHRP secretagogues.18 peptides 03MitochondrialEnergy, biogenesis, and exercise mimetics.18 peptides 04Tissue RepairHealing, regeneration, recovery.10 peptides 05CognitiveFocus, mood, neuroprotection.16 peptides 06Skin & HairCollagen, pigment, follicular.10 peptides 07ImmuneT-cell, innate, modulatory.9 peptides 08Sexual HealthLibido, desire, function.8 peptides 09SleepArchitecture and onset.3 peptides 10LongevitySenescence, telomeres, healthspan.8 peptides 11Gut HealthBarrier, motility, microbiome.4 peptides 12MuscleHypertrophy and performance.7 peptides

The peptides everyone’s asking about.

Pulled from search volume, trial citations, and editorial picks. Each entry links to a full profile.

View all 124

Semaglutide

Long-acting GLP-1 receptor agonist approved for type 2 diabetes and chronic weight management, with established cardiovascular benefit.

GLP-1 & IncretinEstablished

Tirzepatide

Dual GIP/GLP-1 receptor agonist producing greater average weight loss than semaglutide in head-to-head trials.

GLP-1 & IncretinEstablished

Retatrutide

Investigational triple agonist (GLP-1, GIP, glucagon) producing the largest weight loss seen in Phase II trials to date.

GLP-1 & IncretinClinical

BPC-157

Pentadecapeptide derived from a gastric protein; widely used in research and compounding for tendon, gut, and soft-tissue repair.

Tissue RepairPreclinical

TB-500

Synthetic fragment of thymosin beta-4 promoting actin regulation, cell migration, and tissue repair.

Tissue RepairPreclinical

Ipamorelin

Selective ghrelin receptor agonist that releases GH without meaningfully raising cortisol or prolactin. The cleanest GHRP.

Growth HormonePreclinical

MOTS-c

Mitochondrial-derived peptide that acts as an exercise mimetic, improving insulin sensitivity and metabolic flexibility.

MitochondrialPreclinical

SS-31 (Elamipretide)

Tetrapeptide that targets the inner mitochondrial membrane, stabilizes cardiolipin, and improves ATP production in dysfunctional mitochondria.

MitochondrialClinical

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Step 01

Browse by goal

Pick a goal: fat loss, healing, cognition, longevity. We group peptides by what they actually do, not by trade name.

Step 02

Read the profile

Every peptide has a detailed page: mechanism, dosing protocol, practical notes. Both standard and women's protocols where they differ.

Step 03

Weigh the evidence

Every compound is rated: established, clinical, preclinical, or experimental. The reasoning is always on the page.

The supply chain is not forgiving.

The US peptide supply chain changed materially between late 2023 and early 2026: 14+ peptides restricted from compounding, two of the largest research vendors shut down, and 55 FDA warning letters in September 2025 alone.

Our directory maps every supplier with their credentials and their red flags on the same card. Nothing is recommended. Everything is cross-verifiable.

Browse the supplier directory

503B pharmacies

Telehealth

Research-use-only

International

Credentials visible up-front

PCAB, FDA 503B registration, LegitScript, NABP, shown on every card.

Red flags shown beside them

30 suppliers with warning letters, lawsuits, recalls, or 483 observations. 7 closed, raided, or prosecuted.