The 2026 Peptide Vendor Scorecard

Update, September 2026. Moved from fourth to second in September 2026: Limitless is the only vendor besides Amino Club that produced a reader order this year, it manufactures in the US, and its COAs sit on the product pages. Product links open the storefront while the vendor rebuilds its product URLs.

Limitless Life Peptides (Gulf Breeze, FL) is a long-standing fixture in the US research-compound space, with a broad catalog spanning peptides, ampakines, nootropics, and supplements. They publish COAs on the catalog pages rather than attaching them per-order, which is a step the buyer has to take themselves. Public reputation is uneven: Trustpilot averages well above four stars across hundreds of reviews, but BBB has complaints on file and other review aggregators score them lower. Recurring complaint themes include international shipping fees and slower email response times. Not scam territory, but the most uneven reputation profile of the six vendors covered here. A reasonable mid-pack pick if you are comfortable pulling COAs from the product page and accept that support cadence is slower than the top tier.

Update, September 2026. Moved from second to third in September 2026. The documentation marks stand. What changed is price: Pantheon sells small vials (5mg BPC-157 at $60, 2mg TB-500 at $40), which puts it at two to five times the per-mg cost of the top two, and Bureau readers have not placed an order there this year despite steady visits.

Pantheon Peptides was, in April, our pick for a researcher on a budget; the per-mg math no longer supports that, but the catalog and documentation still do. The catalog is the broadest in the top tier, covering most GLP-1s, recovery peptides, and growth hormone secretagogues in one place. They publish a Lab Results page with batch-searchable COAs, and our test orders arrived with documentation accessible. Pantheon is a younger company (founded 2023, Vancouver-based per public records), so the multi-year reputation track is shorter than legacy vendors, but the documentation infrastructure they have built is as strong as anything else in the set.

New, September 2026. PSPeptides was added to the scorecard on 8 September 2026. It is scored on the same six metrics as everything else, but no Bureau reader has ordered there yet, so the consistency mark is provisional and it sits below the vendors with order history. We will revise it either way once there is data.

PSPeptides is a US manufacturer with an 85-item catalog and a batch Certificate of Analysis on every product page, backed by a certifications page rather than a COA sent on request. Three things separate it from the rest of this scorecard. It ships to Canada, the EU, the UK and Australia, which no other vendor here does, so for a reader outside the United States it is currently the only listed option. It sells formats nobody else in the set does: oral tablets (BPC-157 at 250mcg, GHK-Cu at 2mg, SLU-PP-332, noopept), throat and nasal sprays, and a refillable injection pen with 3mL cartridges. And it lists compounds the others do not, including CagriSema, survodutide, mazdutide, GHRP-2 and GHRP-6.

On price it splits cleanly. Small single vials are expensive: BPC-157 5mg at $49.99 against Amino Club's 10mg at $39.99, TB-500 5mg at $44.99 against $39.99 for twice the peptide. Large vials are the opposite and are the cheapest we track: retatrutide 30mg at $144.99 works out at $4.83 per mg against $6.67 at Amino Club, the 40mg vial at $179.99 has no equivalent anywhere else in the set, and GHK-Cu 100mg at $39.99 is $0.40 per mg against $0.58. Reader code PEPTIDEBUREAU takes 10% off any order and still counts it for the Bureau, which is not true of the rotating sitewide sale codes the site pushes. All prices are list prices read from the store on 8 September 2026.

Update, September 2026. Moved from first to fourth in September 2026. Apollo still has the cleanest documentation in the set. It is also the most expensive per mg of the vendors we track on BPC-157 and TB-500, and after several hundred reader visits this year it has not produced a single order. Documentation earns the marks; readers have voted on price.

Apollo Peptide Sciences is the vendor for researchers who prioritize documentation over price. The catalog is curated rather than exhaustive, with a notable concentration on GLP-1 compounds (semaglutide, tirzepatide, retatrutide). Their site publishes third-party HPLC/MS testing references and batch-level COAs are accessible to customers. Shipping in our test orders was prompt and the support team replied to documentation questions inside the same business day. The trade-off is that per-vial pricing sits at the top end of the category. Newer entrant in the space than some competitors, so the multi-year reputation track is shorter, but everything we have observed and read in public reviews is consistent with the documentation-first positioning they advertise.

Scored October 2026. Ascension sat on this page as Under Evaluation from July. This score is built from what can be verified online and as a visitor to the store on 6 October 2026: the certificate library, the live cart, the published policies and the public record. It does not yet include a blind sample or a reader order; the entry moves when either lands.

Ascension Peptides is a Colorado vendor (domain registered September 2023, selling since 2024) with 41 listings in 3 mL vials: the recovery pair, GHK-Cu in 100 mg vials, the secretagogues, a run of 10 mg cognitive and longevity peptides, HCG, NAD+ in a 1,000 mg vial, and the GLP compounds under coded names (S-5 is semaglutide 5 mg, T-10 and T-30 tirzepatide, R-10 and R-30 retatrutide, C-10 cagrilintide). It does not sell bacteriostatic water or supplies. The documentation is the strong point: a public, searchable library of 85 batch certificates, each with lot number, purity and test date, and the certificate itself is a Kovera Labs report with RP-HPLC purity, LC-MS identity, measured net content against the label, endotoxin, sterility and heavy metals, plus a report number and access code that can be checked on the lab's own verification page. The batch we opened (melanotan-1, lot 22-05260628, certified 10 June 2026) read 99.75% purity and 11.23 mg in a 10 mg vial. Across the library the published purities sit between 99.2% and 99.7%. Product pages link to the library rather than to their own batch, the newest record is from July, and nobody independent has retested a vial yet.

Price is where Ascension now stands out. At list-sale prices BPC-157 10 mg is $49.00, the lowest per milligram in our cost index, and GHK-Cu 100 mg is $59.00; TB-500 is dear at $54.00 for 5 mg, and the GLP vials are priced above Amino Club before any discount. Through the Bureau's link the cart applies a 50% coupon on its own, every order, no code to type: we watched the same $49.00 vial fall to $24.50, and the vendor confirmed in writing that the coupon does not expire. Shipping is a flat $15 by UPS on every order, dispatched within 24 hours; the site quotes 2 to 5 business days on one page and 5 to 7 on another. Payment is card, Apple or Google Pay, or ACH debit, behind an account login.

The weak points are policy and track record. All sales are final, with a 24-hour window to report a damaged or wrong item and no refunds otherwise; loss in transit is the buyer's problem unless Route protection is added at checkout. Two navigation links (FAQ, About) return errors. And the Trustpilot profile this entry pointed to in July is gone: Trustpilot now shows "this profile has been removed" because the business "goes against our guidelines", which removes the only public review signal the vendor had, whatever the cause. There is a phone line with posted weekday hours, which few vendors in this set offer.

Sports Technology Labs is best known in the broader market as a SARMs-first vendor that has expanded into research peptides. Their differentiator is published per-batch COAs from accredited US labs, which they post openly. Public reputation across r/SARMs, r/sarmssourcetalk, and dedicated review sites is strong. The trade-off is that their peptide line is narrower than peptide-first vendors, GLP-1 weight-loss compounds in particular are thinner, and they are not the right fit if you are buying tirzepatide or semaglutide. If documentation culture is what you are optimizing for and your protocol is centered on classic research peptides, they deserve a look.

OMNI Peptides is a Las Vegas based research peptide vendor with a public COA library and a catalog of about thirty listings that covers the three GLP compounds under coded names (GLP-1 is semaglutide, GLP-2 is tirzepatide, GLP-3 is retatrutide), the recovery pair, KLOW, MOTS-c, NAD+, tesamorelin and the usual secretagogues, plus cagrilintide, survodutide and mazdutide, which few US vendors stock. The store advertises same-day dispatch, free shipping over $200 and a 10% sitewide code (OMNI10) on the header of every page. None of that has been tested by us yet: no blind sample, no reader order data, no price-per-mg row in the index. The entry is here so readers who already order from OMNI can find the COA panel and the link, and it moves to a scored entry when the listing process completes. The Bureau joined OMNI's affiliate program on 26 September 2026; as with every vendor, that has no bearing on the score.

NextgenPeps is a US research peptide vendor with about eighty listings: the GLP trio under coded names (GLP-1S is semaglutide, GLP-TZ is tirzepatide, GLP-RT is retatrutide), cagrilintide, survodutide and mazdutide, the recovery and secretagogue sets, a capsule line (BPC-157, BPC-157 plus TB-500, glow) and a long tail of Khavinson bioregulators that few US vendors carry. COAs sit in a public library linked from the main navigation; the three we were sent for BPC-157, the BPC-157 and TB-500 blend and tirzepatide are third-party reports with batch numbers. The vendor says it ships inside the US in one to five days and opened a Canadian warehouse in 2026 (nextgenpeps.com/ca, same catalog). Reader code PEPTIDEBUREAU takes 10% off and keeps the order counted for the Bureau. Nothing here has been tested by us yet: no blind sample, no reader order data, no price-per-mg row in the index. The entry moves to a scored one when the listing process completes. The Bureau joined the vendor's affiliate program on 1 October 2026; as with every vendor, that has no bearing on the score.