Primary regulatory

Warning Letter: Gram Peptides

FDA warning letter discussing peptide products marketed online and the limits of research-use-only positioning.

U.S. Food and Drug AdministrationPublished 2026-03-31Accessed 2026-06-30

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Registry record

Source metadata

Publisher
U.S. Food and Drug Administration
Source type
Primary regulatory
Registry ID
fda-gram-peptides-warning-2026

Source usage

Linked from 36 pages

BPC-157

CJC-1295

GHK-Cu

Ipamorelin

MK-677 (Ibutamoren)

Sermorelin

Tesamorelin

Unapproved Weight-Loss Drug 'Reta' Sold Online Despite Safety Concerns

Safety Concerns Over Doctors Prescribing an Experimental Weight-Loss Drug

Unapproved Weight-Loss Drug Sparks Black-Market Concerns

BPC-157 vs TB-500

CJC-1295 + Ipamorelin vs Tesamorelin

CJC-1295 DAC vs No DAC

MK-677 vs Ipamorelin

Retatrutide vs Tirzepatide

Sermorelin vs Tesamorelin

Best Peptides for Growth Hormone Release

Best Peptides for Inflammation Research

Best Peptides for Injury Repair

Best Peptides for Muscle Recovery

Best Peptides for Skin and Anti-Aging

Best Peptides for Weight Loss

FDA Enforcement Timeline: Major Actions on Peptides and Compounding

FDA Warning Letter Tracker: Enforcement Actions Against Peptide Sellers

How to Evaluate a Peptide Supplier

How to Read a COA (Certificate of Analysis)

Payment Processing for Peptide Businesses

Peptide Business Compliance Guide: Labeling, Claims, COAs, and FDA Enforcement for RUO Sellers

Peptide Category Explainers: How Every Compound Class on This Site Is Defined

Peptide Terminology Glossary

Community Guidelines: What's Allowed and Not Allowed in Peptide Discussions

Peptide Community Hub: Reddit, YouTube, Telegram, and Discord Spaces

RUO Marketplace Risk Guide: How to Evaluate Marketplace Risk Without Buying

RUO vs Telehealth: How People Access Peptides

User-Submitted Supplier Reviews: A Moderated Framework for Sharing Supplier Documentation Experiences

What Does 'Research Use Only' Actually Mean?

Interpretation boundary

What this record can and cannot establish

Inclusion in the registry is not endorsement. The record supports only the claims that fit its design, population, date, and scope. Company, media, and community records can document that a claim was made without proving the claim itself.