For Research Use Only | Products on this marketplace are intended for research and laboratory use only.
The Peptide Marketplace
Browse listings from US suppliers, compare compounds side by side, and see seller reputation scores built from public review evidence. All in one place, for research use.
Shop the MarketplaceSearch the full marketplace. Product pages carry prices, discount codes, and vendor ratings, and link to the research guide when one exists for the compound.
About these counts: the counts above are this site's own index counts, taken from the live database behind this page: compounds in the research library, active product listings, vendors with live listings, and study citations linked in library entries, rounded down for display. Vendor ratings are a separate system, recomputed on a weekly cycle under the published method on the vendor ratings page. Updated November 2026.
Simms Research
35% off
35% off every available compound in the Simms Research catalog at checkout with code VETS35. Free replacement if a package is lost, stolen or damaged in transit. Orders of $200 or more ship free by FedEx 2-Day.
American Peptides
10% off
10% off every tablet in the new Tablet Collection with code TABLETS10. Nine research compounds now in tablet format. Ends Sunday, November 22 at 11:59 PM Central.
American Peptides
10% off
American Peptides launched its Tablet Collection - nine research compounds now in tablet format, including BPC-157 tablets and GHK-CU tablets. Take 10% off every tablet with code TABLETS10.
Voltera Sciences
Buy one, get one free on select items at Voltera Sciences: add an eligible item and a matching one in the same mg size is added free automatically. All remaining lyophilized products and sprays are 35% off. The 10% partner code stacks on top of the promotion, and customers save an extra 5% paying with Zelle, Venmo or Cash App. Orders $150+ get free ground shipping and a free 3ml bac water; orders $250+ get free priority shipping, a free 3ml bac water, and one free product from the gift selection. BOGO items may rotate through the weekend. Sale ends Monday, November 16 at 11:59 PM PST.
Unyx Peptides
Free Gift Week at UNYX Peptides: a free Tesamorelin 5mg vial (an $80 value) is added automatically to every order over $149. No code needed. Part of their weekly free-compound series leading up to Black Friday - a different compound each week.
American Peptides
Buy 3, Get 2 FREE on any mix of 38 qualifying research peptides and liquid sprays: add 3 units and 1 is free, add 5 and 2 are free, add 10 and 5 are free. The cheapest units in the cart come off automatically at checkout. No code needed. The offer runs in three tiers: Buy 2 get 1 FREE (33% off), Buy 3 get 2 FREE (40% off), and Buy 5 get 5 FREE (half off). Free shipping on orders over $300.
Researchers and lab buyers who want to compare verified research-peptide sellers in one place: real prices, working discount codes, and published lab documents, checked before you buy on the seller's own site.
Anyone looking for peptides for human or animal use, medical advice, dosing information, or a store that sells and ships peptides directly. Peptide Stores Online is a comparison marketplace and research library; everything listed is for in-vitro research use only.
Counts from Peptide Stores Online records, November 8, 2026: the verified lab documents cover 461 products, and 25 vendors have live listings today. The research library also holds 5,250 dataset fact pages and 2,029 published study records. Each research page's single top offer is picked from our own human outbound click records (trailing 12 months) and refreshed daily.
Ranked by real human clicks on Peptide Stores Online over the last 30 days, counted by our popularity engine. Test clicks and bot clicks are removed before counting. The card shown for each compound is its lowest priced in-stock listing.
Tirzepatide - 1,404 clicks this month
5-Amino-1MQ - 234 clicks this month
Retatrutide - 232 clicks this month
AHK-Cu - 161 clicks this month
Semaglutide - 131 clicks this month
BPC-157 - 111 clicks this month
TB-500 - 65 clicks this month
GHK-Cu - 53 clicks this month
Trend arrows compare clicks from the last 7 days with the 7 days before that. Counts and trends come only from clicks on Peptide Stores Online. No outside sites or forums are used.
1,404 clicks this month - 39 listings
Source: Peptide Stores Online clicks
234 clicks this month - 28 listings
Source: Peptide Stores Online clicks
232 clicks this month - 63 listings
Source: Peptide Stores Online clicks
161 clicks this month - 10 listings
Source: Peptide Stores Online clicks
131 clicks this month - 18 listings
Source: Peptide Stores Online clicks
111 clicks this month - 51 listings
Source: Peptide Stores Online clicks
65 clicks this month - 32 listings
Source: Peptide Stores Online clicks
53 clicks this month - 56 listings
Source: Peptide Stores Online clicks
Every shelf below comes from the live catalog. If a department has no listings, it does not appear here.
Every active listing from our affiliate vendors, best value first. Open a product to see its full page here, then continue to the vendor site from that page to order. Peptide Stores Online may earn a commission on purchases made through vendor links, at no extra cost to you.
1681 listings
More listings load automatically as you scroll.
Looking for the research behind a compound? Visit the Research Library or use the search bars: every product result links to its research guide when one exists.
One vendor profile featured each day, rotating through every published spotlight. Research use only.
Aura Research on Peptide Stores Online: 40 active listings across 40 compound groups, with single vials and 10-vial kits side by side across the whole range.
Live marketplace listings from affiliate vendors. Prices are set by each vendor. Ordering, payment, and delivery happen on the vendor site.
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, and you can search them before you order from a vendor. Coverage of the vendors listed on this site is limited: most have no Finnrick result, so check what exists for the vendor you are considering.
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.
We are an affiliate marketplace. We do not handle sales, orders, or payments.
Compare live listings from affiliate vendors side by side, right here on the homepage or in the shop.
Every listing opens on our own product page first, with the price, any discount code, and the vendor rating in one place.
From the product page, continue to the product page on the vendor own website to order and pay there, under the vendor terms.
The vendor ships your order and handles delivery, returns, and order support.
Vendors join through an affiliate signup. Accounts are approved automatically, and listings are imported from the vendor catalog.
A vendor applies to list on Peptide Stores Online. Approval is automatic, and listings are added through an automated catalog import. 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.
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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 open a listing, you land on our product page first, and from there you continue 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.
