Simple Peptides shut down: what happened and alternatives (2026)
What Simple Peptides publishes about its catalogue, its lab reports, its shipping and its payment terms, read from simplepeptides.com on September 16, 2026and checked against FDA's warning letter database. A listing is not an endorsement, and we do not verify purity, identity or what is in any individual vial.
This page reports what published studies found. It is not medical advice, no provider-patient relationship is created by reading it, and nothing here is a recommendation to use any compound. Talk with a licensed clinician about your own situation. Read the full disclaimer.
At a glance
| Status | Closedsince September 16, 2026 The domain is parked. On 2026-09-16 simplepeptides.com served a two-line page that redirects to /lander, a registrar parking page, and its entire sitemap contains that one URL. There is no storefront and no closure notice. |
|---|---|
| Lab reports | Not published We could not confirm a certificate policy from the pages we could read. |
| Ships to | Not published |
| Payment | Not published |
| FDA warning letters | None found in FDA's warning letter database when we searched it on September 16, 2026. |
| Website | simplepeptides.com |
Simple Peptides has shut down (September 16, 2026).
The domain is parked and redirects to a registrar landing page; no shop remains.
Alternatives: Core Peptides, Liberty Peptides, Biotech Peptides.
Compounds listed
Products this vendor lists that match a compound we track, read from its own catalogue. Coded or abbreviated product names are not mapped, because that would mean guessing at what is in the vial.
No catalogue was readable when we checked, so no compounds are recorded for this vendor. Every compound profile carries its own regulatory status regardless of who sells it.
What we found
Simple Peptides no longer has a storefront. On 2026-09-16 the domain served a two-line HTML page whose only function is a redirect to a registrar parking lander, and the site's sitemap contains that single URL and nothing else. A parked domain means the name is registered and pointed at a placeholder rather than at a shop.
There was no closure notice, no statement about open orders and no contact route. That is the common ending for a gray-market research vendor: the site stops resolving to a shop and nothing is said about it.
Simple Peptides did not appear in FDA's warning letter database when we searched it on 2026-09-16, so there is no public enforcement record tied to the name. This page stays up because the query still gets asked; the answer is that the site is gone.
What “research use only” means, and the market it sits in
Every vendor in this section sells material labelled for research, laboratory or analytical use and not for human consumption. That label is not a formality and it is not a loophole. It is the seller stating that the product has not been through the approval or compounding systems that govern medicines, and that it is not intended for a person.
The market is under active enforcement. FDA's public warning letter database shows a continuing run of unapproved-new-drug and misbranding letters to peptide sellers: Gram Peptides and Pink Pony Peptides on 31 March 2026, Wholesale Peptide on 17 June 2026, and five on a single day, 24 August 2026, to Peak Performance Peptides, Royal Peptides, NuScience Peptides, Peptide Partners and Tex Peptides. Of the vendors profiled here, one appears in that database: Swiss Chems, letter dated 10 December 2024.
Criminal exposure is real as well. In the Northern District of Indiana, the operators of Paradigm Peptides entered guilty pleas on 10 December 2025 over products sold as SARMs that in fact contained testosterone and over unapproved peptide and hCG products; both were sentenced in July 2026. Separately, payment processors have been withdrawing from this category, which is why so many storefronts route buyers to crypto, Zelle or bank wire rather than a card.
There is a lawful route for several of these compounds, and it is not this one. At its meeting on 23–24 July 2026, FDA's Pharmacy Compounding Advisory Committee voted to recommend BPC-157, KPV and TB-500 (8–6, one abstention) and MOTS-c (7–5, two abstentions) for the section 503A bulk drug substances list. That vote is advisory: FDA decides, and where compounding proceeds it runs through a licensed prescriber and a licensed pharmacy, not a research storefront.
Sources for this section
- FDA warning letter database (searched 16 September 2026)
- FDA warning letter to Swisschems, 10 December 2024 (MARCS-CMS 695663)
- FDA warning letter to Gram Peptides, 31 March 2026
- FDA warning letter to Peak Performance Peptides, 24 August 2026
- United States v. Matthew Kawa, N.D. Indiana (guilty pleas entered 10 December 2025)
- FDA Pharmacy Compounding Advisory Committee, 2026 meeting materials (meeting of 23–24 July 2026)
Compound profiles carry the regulatory status for each substance, and online peptide therapy covers the prescription route.
Frequently asked questions
Did Simple Peptides shut down?
The domain is parked, which is the practical equivalent. On 2026-09-16 simplepeptides.com redirected to a registrar parking lander and its sitemap contained only that page. No closure notice was published.
Is Simple Peptides legit?
There is no storefront to evaluate. Any site currently presenting itself as Simple Peptides and taking payments is not running from the domain we checked, which serves only a parking page.
What do Simple Peptides reviews say?
Reviews written while the shop was live describe a storefront that no longer exists, which is the general problem with vendor reviews in this market. We do not aggregate them.
Does Simple Peptides have a discount code?
There is no storefront to use one on. We do not issue codes for any vendor listed here.
What are the alternatives to Simple Peptides?
The open vendors listed on this page publish readable terms, and several publish lot certificates. The separate question is whether a research vendor is the right route at all: a licensed prescriber and pharmacy is the only lawful path for a person, and our telehealth section covers it.
Want it prescribed instead?
Nothing on this page is a route to a peptide for a person. The lawful route runs through a licensed prescriber and a licensed pharmacy, and for several of these compounds it exists today. Our telehealth section compares programs on prescriber type, pharmacy model, whether labs are required, state coverage and published pricing, and each compound profile states what can lawfully be prescribed or compounded right now.
Where the research stands
Our research digests summarise new studies against their primary sources, and are peptides legal explains the difference between an approved drug, a compounded preparation and a research chemical.