Health Guide
Peptides and medicines, explained plainly
What each compound is, what the research actually shows, safety, and how it is handled. 95 compounds, 142 mixing and dosing charts.
Not sure where to start? Pick what you're interested in and we'll show you the most-read guides. Get started →Most popular by area
See the full library →How strong is the evidence?
Every compound carries one of these labels so you can tell a proven medicine from an early lab finding at a glance. Click one to see every compound at that level.
Most popular overall
Retatrutide
An investigational once-weekly medicine from Eli Lilly that activates three hormone receptors: GIP, GLP-1 and glucagon. Phase 3 trials report substantial weight loss, but it is not FDA approved.
Read more →MOTS-c
A 16-amino-acid peptide encoded by mitochondrial DNA, studied for energy metabolism, insulin sensitivity and exercise. The strongest treatment findings come from cells and animals; a human trial is registered but has no results yet.
Read more →Tesamorelin + Ipamorelin blend
Two compounds that act on growth-hormone signaling in different ways. Tesamorelin has solid clinical evidence for one specific use; the pairing with ipamorelin has not been tested.
Read more →Tirzepatide
An FDA-approved prescription peptide that activates both GIP and GLP-1 receptors. It lowers blood sugar and helps eligible patients lose weight. Mounjaro and Zepbound contain the same ingredient but have different approved uses.
Read more →Semaglutide
The active ingredient in several FDA-approved GLP-1 medicines. Depending on the product, approved uses include type 2 diabetes, weight management, and certain heart, kidney or liver conditions.
Read more →Tadalafil
An FDA-approved PDE5 inhibitor for erectile dysfunction and enlarged-prostate symptoms. It lasts up to 36 hours, much longer than sildenafil.
Read more →New to peptides? Start here
Peptide basics
What a peptide is, how approved medicines differ from research products, and why combinations need their own evidence.
Read the FAQ →Glossary
Plain-English definitions of the terms you will see: analogue, secretagogue, IGF-1, COA, HPLC, phase 3 and more.
Open the glossary →Compound Library
Every compound in one place, sorted by what people look up most, with evidence levels and safety notes.
Browse the library →