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Five suppliers compared (2026) · Updated October 13, 2026
The five suppliers in the linked October 2, 2026 peptide vendor reviews differ in their COA verification routes, identity evidence and purity reporting. American Peptides' reports carry laboratory verification codes; the reviewed Biotech Semax report names no lab. The examples below compare dated documents from Biotech, American, Verified, Core and Pure Health Peptides, rather than certify their products or current stock.
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The dated source reviews describe the five stores and specific lot documents checked October 2, 2026. Current availability needs a separate check.
The reports differ on two points: whether the lab is named and linked, and whether purity is a measured figure.
American Peptides links each report to its laboratory through a verification code.
As of October 2, 2026, Biotech Peptides was a live store, and the source review reported a COA on each product page it inspected. The NAD+ 500mg report for lot 3140062 comes from MZ Biolabs and is dated July 15, 2026. It gives purity of 98.86% and no endotoxin result, and its QR code opens the same report on the lab's site. The Semax report for lot 3140081, dated March 7, 2026, is on a template that names no laboratory. Biotech Peptides also does custom synthesis, which may suit a researcher who needs a sequence outside the usual catalog range. A Biotech Peptides review goes stale as soon as a new lot is posted, so check the date on the report you hold.
Endotoxin is measured with its own assay, apart from HPLC purity, and FDA guidance on endotoxin testing describes the gel clot, photometric and kinetic methods. The dated Biotech Peptides lot-by-lot comparison provides the reviewed Semax documents and a comparison report. Compare the same analytical fields rather than treating a purity percentage as a substitute for identity or endotoxin testing.
American Peptides was open for orders on October 2, 2026. The store posts a COA for each product and lot, issued by Bioviridian Inc. in College Station, Texas, and the verification code on each report loads the lab's copy. The NAD+ 500mg report for lot NAD500-0803 reads 99.78%. For Semax lot SEMX10-0803, report COA7586 exists in two versions. The copy on the store's own site carries August 17, 2026. The lab's version carries August 28, 2026 and has an extra sterility line. American Peptides lists delivery to 215 countries and territories, which could suit researchers based outside the United States.
The dated American Peptides lot and shipping comparison records the two versions of the Semax report and the shipping terms checked October 2, 2026. A link to the issuing laboratory helps confirm the document; it does not certify every item a supplier ships.
Verified Peptides was taking orders on October 2, 2026, and its reports come from Janoshik. Each carries a key for checking it on the lab's site, though the source review reported a bot challenge on the laboratory verification page. For the batch listed on that date under NAD+ 1000mg, NAD0826610G, the page links a Janoshik report from July 23, 2026 that covers identity and amount (1150.00 mg). The sterility report beside it is for an earlier batch, NAD022661000F, and the source review found no purity percentage for that batch on the page. Verified lists a cold-pack shipping box that includes an ice pack, which may appeal to researchers who prefer cold packing.
The dated Verified Peptides NAD+ report check describes the document fields confirmed by its author and the fields that could not be confirmed. Those findings apply to the reviewed report, rather than every current lot.
Of the sites using the Core Peptides name, corepeptides.com is the original. Its domain dates to October 2019, and the store accepted orders on October 2, 2026. Four or more newer sites share the name, and corepeptides.com links to none of them. The source review did not establish who runs those other sites. At the original store, the NAD+ 100mg report for lot C74156 comes from Vanguard Laboratory, is dated July 15, 2026, and lists HPLC purity of 98.14% with no identity result. The PDFs sit on the store's own site without a verification code. No report was posted on the Semax 25mg page that day.
The dated Core Peptides copycat domain guide lists the five domains and their registration dates. Verify the specific storefront and its current laboratory records before relying on a familiar name.
On October 2, 2026, Pure Health Peptides was live and required a buyer check before fulfillment. Its COA library can be searched by batch ID and holds reports from Ethos Analytics in Phoenix, Arizona. For lot TUY-060326, the Semax 10mg report completed July 6, 2026 states purity as >99%, with endotoxin under 1.25 EU/mL and a microbial pass. Identity is matched to a reference standard by HPLC retention time. Pure Health hosts the files itself. To reach the lab's copy, a visitor fills in a form that requests a company name and a sample ID. The store also lists formats beyond powder, such as liquids.
The dated Pure Health Semax report comparison supplies the source documents for these findings. Check whether a report gives a measured purity figure, an identity result and a laboratory verification route; each answers a different question.
Compare the report for the lot currently offered, then verify the supplier's operating records. The COA guide explains the analytical fields, while the supplier checklist covers identity and policies. For a current listing, start with the research product catalogue and open the corresponding lot report.
As of October 2, 2026, American Peptides was open for orders and posting lot reports from Bioviridian Inc., each carrying a code that opens the lab's own copy. The cited review reports no purchase or product testing. Its findings reflect the public pages checked that day, and new lots can change them.
As of October 2, 2026, Biotech Peptides was a live store, and the source review reported a COA on each product page it inspected. The NAD+ report names MZ Biolabs and opens on the lab's site from a QR code. The Semax report names no lab. The cited review did not report purchasing or testing its products.
The original Core Peptides website is corepeptides.com, registered in October 2019 and open for orders on October 2, 2026. Four or more newer sites share the name, and the original does not link to them. The source review did not test whether those sites ship product, so type the domain into your browser yourself.
A useful COA carries the lot number printed on the label, names the testing lab and reports HPLC purity and identity. Fill and endotoxin results add detail where the lab ran them, and a verification link or code lets you load the lab's own copy.
Browse the current research catalogue and check the lot documents in the COA library. Catalogue materials are supplied for research use only, not human or veterinary use.