The Peptide Marketplace
Browse listings from vetted US suppliers, compare compounds side by side, and see independent seller reputation scores - all in one place, for research use.
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Independent lab results from Finnrick Analytics
Finnrick Analytics is an independent peptide testing platform. It does not sell peptides and does not advise on use. Finnrick publishes independent lab test results for peptide products sold by named vendors, with thousands of published results you can search before you order from a vendor.
Viewing published results on Finnrick is free. A free account unlocks full leaderboards and complete test detail.
HPLC analysis covering whether the sample matches the peptide it is sold as.
HPLC analysis covering the purity reported for the sample that was tested.
HPLC analysis covering how much peptide the test found in that sample.
Free community testing: US residents can submit a sealed, unopened sample of an eligible product for free testing, and the results are published on Finnrick. 15 peptides are currently covered for free community testing. Paid testing exists for other products and extra screens.
Browse published results on Finnrick
Peptide Stores Online does not test products and does not partner with Finnrick. Results are published by Finnrick, not by us. A published result covers the sample that was tested, not every product a vendor sells. All products listed on this site are for research use only.
An automated system collects public Reddit community discussions that name a vendor, analyzes the language in them with AI sentiment analysis, and combines the evidence into one seller score, recomputed on a weekly cycle. A score is published only when a vendor has at least 15 qualifying mentions drawn from at least 2 different source categories. Until then the vendor is listed as Not Yet Rated - which is where most vendors stand today.
FDA approvals, advisory votes and regulatory updates - tracked daily
Vendors apply via an affiliate application we review before their listings appear.
A vendor applies to list on Peptide Stores Online. We review the application and the vendor site before listings go live. Listing here is not an endorsement.
Listings must be positioned for in-vitro laboratory research use only. We do not list waters, syringes, needles, solvents, or supplies. Each listing must link to the product page on the vendor own site.
We monitor vendor reputation from public review evidence using our published methodology. Ratings are published only when a vendor reaches the evidence threshold. Most vendors are Not Yet Rated.
Popular compounds in the research library
Live marketplace listings from affiliate vendors. Prices are set by each vendor. Ordering, payment, and delivery happen on the vendor site.
We are an affiliate marketplace. We do not handle sales, orders, or payments.
Read the research library and compare live listings from affiliate vendors side by side.
Each listing links to the product page on the vendor own website.
You place your order and pay the vendor directly, under the vendor own terms.
The vendor ships your order and handles delivery, returns, and order support.
Vendors publish their own testing documents on their own sites. We do not order or perform lab tests, and we do not guarantee the purity of any product.
Where a vendor has testing documents, such as a Certificate of Analysis, the vendor publishes them on its own site. Review them there before you order.
Our vendor ratings are computed from public review evidence. Independent testing sources named in the methodology are one part of that evidence.
A rating is published only at 15 or more qualifying mentions from 2 or more source categories. Below that threshold a vendor is listed as Not Yet Rated.
Scores come from real public reviews - never from vendors, and never for sale
Our automated system collects public review evidence that names a vendor, analyzes the language in them, and combines the evidence into a single seller score on a 0 to 5 scale. Scores are recomputed on a weekly cycle. No vendor can pay for a better score, buy a position in the directory, or have negative evidence removed.
A score is published only when a vendor has at least 15 qualifying mentions drawn from at least 2 different source categories. Below that line, the vendor is listed as Not Yet Rated - which is where most vendors stand today. Not Yet Rated means there is not enough verified public evidence to publish a fair score yet; it does not mean the vendor scored zero.
A rating describes a seller and its service only. It is never a rating of a product, and it says nothing about whether a product works, is safe, or is pure.
Vendors are listed after an affiliate application review and must follow the catalog standards on this page. Our listing process does not include identity verification, lab testing, or guarantees.
Affiliate Application
Application reviewed by our team
A vendor applies to list here. We review the application and the vendor site before listings appear.
Catalog Standards
Research use only, product level links
Listings must be positioned for in-vitro laboratory research use only. No waters, syringes, needles, solvents, or supplies may be listed. Every listing needs a product level link to the vendor site.
Public Reputation
Ratings from public review evidence
Vendor ratings are built from public review evidence under the published methodology. Vendors cannot pay for a better rating.
Research entries for the compounds in our library, with study citations linked to their sources so you can read the underlying research yourself.
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Research peptides are offered for in-vitro laboratory research purposes only, not for human consumption. It is your responsibility to know and follow the laws that apply to you and to use any product only for lawful research.
No. Peptide Stores Online does not sell products, take orders, or process payments. When you click a listing, you go to the vendor own website. You order and pay there, under the vendor terms, and the vendor handles delivery.
From the vendor. Any Certificate of Analysis or other testing document is published by the vendor on the vendor site. Our vendor ratings use public review evidence, including independent testing sources named in our published methodology.
No. We do not order or perform lab tests and we do not guarantee the purity or quality of any product. Vendors publish their own testing documents on their own sites, and you should review them there before ordering.
Ratings are computed from public review evidence and published only at 15 or more qualifying mentions from 2 or more source categories. Most vendors are Not Yet Rated. A rating describes vendor service evidence only. It is not a guarantee of any product.
Library entries link to published study citations so you can read the source. Community reports, where shown, are labeled as community reports and kept separate from published research.
All products listed on Peptide Stores Online are for in-vitro laboratory and educational research purposes only. Not for human or animal consumption. Not evaluated by the Food and Drug Administration. Not intended to diagnose, treat, cure, or prevent any disease or condition. All sellers and buyers agree to full research-use-only terms at account creation. Peptide Stores Online assumes no liability for misuse of any product listed on this platform.
