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ForumsBuyer Beware⚠ 50+ FDA warning letters sent to peptide vendors in 2025 — November 2025

⚠ 50+ FDA warning letters sent to peptide vendors in 2025 — November 2025

sarah_TO Mon, Nov 17, 2025 at 10:49 PM 43 replies 2,068 viewsPage 1 of 9
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sarah_TO
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Sep 2024
Toronto, CA
Nov 17, 2025 at 10:49 PM#1

Eight months with one supplier, then a change in how they communicate that I noticed before I noticed anything about the product.

Red flags, in rough order of how much they should worry you: no verifiable address, no batch numbers, prices far under market, vendor-commissioned tests only, pressure toward irreversible payment, and shipping with no temperature control.

What I actually want to know is what a vetting checklist should actually contain, as opposed to a list of things that are easy to fake.

Numbers rather than impressions, if you have them.

19 14andrew_nyc, Dr.EndoEP, GraceAZ_72 and 16 others
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RetaRick_CA
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Jan 2024
California
Nov 17, 2025 at 11:12 PM#2

This one has a reasonably settled answer, so here it is. Prices dramatically below market are the strongest single signal, and the reason is arithmetic rather than suspicion. Synthesis, testing, and cold-chain shipping have floors. A price well under the floor means something was skipped, and the two things that get skipped are testing and content.

18 13AmyNC_wife, SkepticalSean, Dr.CardioMD and 15 others
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Dr.BariatricHTX
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Feb 2024
Houston, TX
Nov 17, 2025 at 11:35 PM#3
RetaRick_CA said:
Prices dramatically below market are the strongest single signal, and the reason is arithmetic rather than suspicion.

Right, and one flattering data point from a group buy is not consistency. Consistency means separate batches, separately commissioned, over months.

Correct me if the detail matters more than I have assumed.

17 12Dr.EM_Chicago, pete_RVA, CarlaRPh_TPA and 14 others
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nick_newbie
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Jun 2026
Virginia
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Nov 17, 2025 at 11:58 PM#4
sarah_TO said:
Eight months with one supplier, then a change in how they communicate that I noticed before I noticed anything about the product.

Can confirm the pattern sarah_TO describes. The pattern that distinguishes a bad batch from an exit is behaviour rather than product. A bad batch comes with communication, a reshipment offer and a batch number. An exit comes with slower replies, pressure toward less reversible payment methods, sudden discounting, and the same reassurance repeated without any new information. The product tells you less than the correspondence does.

16 11LarryQC_SD, wanda_boise, NurseAsh_DET and 13 others
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PedsEndoPhilly
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Philadelphia, PA
Nov 18, 2025 at 2:02 AM#5

From the other side of the consultation, briefly.

Vendor reputation tracking for vendor vetting: I maintain a personal spreadsheet with every order I've placed — date, vendor, batch number, Janoshik result, personal efficacy assessment (1-5 scale), and any issues.

After 13 orders across 4 vendors: average purity 98.1%, zero sterility concerns, 2 shipping issues (all resolved). This data gives me confidence in my current source and documentation if issues arise.

I encourage everyone to track their orders systematically. Community data aggregation makes us all safer.

15 10MikeNYC_runner and 12 others
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