Skip to content
Peptide.Guide

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.

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
17
Established
FDA approved for ≥1 indication
41
Clinical
In Phase 2/3 human trials
49
Preclinical
Animal & mechanistic data
17
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.

Built for reading, not selling.

No affiliate links. No storefront. No newsletter upsell before you can see content. The public reference is always free.

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

9

503B pharmacies

11

Telehealth

11

Research-use-only

6

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.

Latest in peptide research.

Live from Google News · updated hourly

View all

This site is for educational and research purposes only. It does not constitute medical advice. Always consult a qualified healthcare provider before using any peptide or supplement.