---
title: "Peptides A-Z: Evidence Grades and US Status"
description: "All 13 peptides we track, A to Z, each with its evidence grade, FDA status and WADA status, dated and sourced. No dosing and no sellers."
canonical: https://plainlygraded.com/peptides/
breadcrumb: "BPC-157 > Epitalon > GHK-Cu > KPV > MOTS-c > PT-141 > Retatrutide > Semax > Sermorelin > SS-31 > TB-500 > Tesamorelin > Tirzepatide > Home > Compounds"
publisher: Plainly Graded
policy: "No dosing, no sourcing, no vendor links. Every claim cites a public source."
---

> We collect and compare information from public, cited sources. We cannot guarantee that it is complete, current or correct. This is not medical advice. Only a doctor can prescribe, and a doctor should confirm anything you read here before you act on it.

# Peptides A-Z

[BPC-157](https://plainlygraded.com/peptides/bpc-157/) 

Synthetic 15-amino-acid fragment of a gastric protein

**Evidence grade C**

- FDA: not approved
- 503A compounding: under review
- WADA S0 · prohibited at all times

[Epitalon](https://plainlygraded.com/peptides/epitalon/) 

Synthetic tetrapeptide marketed for longevity

Not yet graded

- FDA: not approved
- 503A compounding: under review
- WADA: not named, ask USADA

[GHK-Cu](https://plainlygraded.com/peptides/ghk-cu/) 

Copper-binding three-amino-acid peptide found in human blood

**Evidence grade C**

- Not approved as a drug
- 503A compounding: not eligible
- WADA: not named, ask USADA

[KPV](https://plainlygraded.com/peptides/kpv/) 

Three-amino-acid fragment of the hormone alpha-MSH

**Evidence grade D**

- FDA: not approved
- 503A compounding: under review
- WADA: not named, ask USADA

[MOTS-c](https://plainlygraded.com/peptides/mots-c/) 

Mitochondria-derived peptide studied for metabolism

Not yet graded

- FDA: not approved
- 503A compounding: under review
- WADA: not named, ask USADA

[PT-141](https://plainlygraded.com/peptides/pt-141/) 

Melanocortin peptide approved for low sexual desire in some women

- Approved

- FDA approved, one use
- WADA: being checked

[Retatrutide](https://plainlygraded.com/peptides/retatrutide/) 

Triple-agonist weight-loss drug in late-stage trials

**Evidence grade A**

- FDA: investigational
- WADA: not named, ask USADA

[Semax](https://plainlygraded.com/peptides/semax/) 

Synthetic peptide approved as a medicine in Russia, not the US

Not yet graded

- FDA: not approved
- 503A compounding: under review
- WADA: not named, ask USADA

[Sermorelin](https://plainlygraded.com/peptides/sermorelin/) 

Former FDA drug; growth-hormone-releasing hormone fragment

Not yet graded

- FDA: formerly approved
- Compounding: being checked
- WADA S2 · prohibited at all times

[SS-31](https://plainlygraded.com/peptides/ss-31/) 

Mitochondria-targeted peptide approved narrowly for Barth syndrome

- Approved

- FDA approved, one use
- WADA: not named, ask USADA

[TB-500](https://plainlygraded.com/peptides/tb-500/) 

Synthetic fragment of thymosin beta-4, a repair-related protein

**Evidence grade D**

- FDA: not approved
- 503A compounding: under review
- WADA S2 · prohibited at all times

[Tesamorelin](https://plainlygraded.com/peptides/tesamorelin/) 

Growth-hormone-releasing peptide approved for one use

- Approved

- FDA approved, one use
- WADA S2 · prohibited at all times

[Tirzepatide](https://plainlygraded.com/peptides/tirzepatide/) 

FDA-approved GIP and GLP-1 drug for type 2 diabetes and weight

- Approved

- FDA approved
- WADA: not prohibited

---

We collect and compare information from public, cited sources. We cannot guarantee that it is complete, current or correct. This is not medical advice. Only a doctor can prescribe, and a doctor should confirm anything you read here before you act on it.

Canonical page: https://plainlygraded.com/peptides/