FDA warning letters to peptide sellers, 2024
3 letters dated 2024 are on record for storefronts in the registry. Each row gives the date printed on the letter, the recipient as the record gives it, the agency's own page and the storefront's status on the day the file was last checked. Other years: 2020, 2021, 2025, 2026 · all years.
| Letter date | Recipient, as the record gives it | Products named | Storefront at last check | Letter | Pages |
|---|---|---|---|---|---|
| Prime PeptidesPrime Vitality, Inc. dba Prime Peptides, Santa Barbara, California | 2 products | On watchlist | fda.gov ↗ | letter page · file C | |
 Swiss ChemsSwissChems, 42 Broadway, New York | 2 products | On watchlist | fda.gov ↗ | letter page · file C | |
 Xcel PeptidesXcel Research LLC, Sheridan, Wyoming | 7 products | On watchlist | fda.gov ↗ | letter page · file F |
What the record says each letter concerned
From the letter pages- Prime Peptides: letter dated 2024-12-10The record says the letter concerned two GLP-class products named in the letter, each described by the agency as an unapproved new drug.C
- Swiss Chems: letter dated 2024-12-10The record says the letter concerned two GLP-class products named in the letter, offered on swisschems.is and described by the agency as unapproved new drugs.C
- Xcel Peptides: letter dated 2024-12-10The record counts seven products named in the letter, GLP-class products among them, each described by the agency as an unapproved new drug.F
Reader questions
Answered from the fileWhich peptide sellers on file received an FDA warning letter in 2024?
Prime Peptides, letter dated 2024-12-10, addressed to Prime Vitality, Inc. dba Prime Peptides, Santa Barbara, California; Swiss Chems, letter dated 2024-12-10, addressed to SwissChems, 42 Broadway, New York; Xcel Peptides, letter dated 2024-12-10, addressed to Xcel Research LLC, Sheridan, Wyoming. The list covers storefronts the desk keeps a file on, not every recipient in the agency's database.
Are the 2024 recipients still trading?
Prime Peptides: on watchlist at the check on 2026-10-19; Swiss Chems: on watchlist at the check on 2026-10-19; Xcel Peptides: on watchlist at the check on 2026-10-19.
Products are described only as GLP-class products or products named in the letter; the agency's own wording is on fda.gov. The tracker lists every year; the watchlist carries closures alongside the letters. Every storefront listed sells material labeled for laboratory research use only.