Peptide Sciences Alternative — Pure US Peptide
Peptide Sciences has voluntarily discontinued sales, and its website now serves a shutdown notice in place of a catalog. If you are rebuilding a supplier shortlist, Pure US Peptide is a research-only U.S. supplier: 53 listings covering 31 distinct research compounds, lot-specific certificates of analysis published on the product page itself for 37 of those listings, and same-day dispatch from a domestic warehouse.
Competitor details on this page were reviewed against peptidesciences.com on July 31, 2026. Quoted text is that company's own wording.
What Peptide Sciences has said
Rather than characterise the closure second-hand, here is the notice the company serves on its own homepage, reviewed on July 31, 2026:
“After careful consideration, Peptide Sciences has decided to voluntarily shut down operations and discontinue the sale of its research products. Peptide Sciences retains all rights, title, and interest in and to its name, brand, trademarks, intellectual property, and associated goodwill, and will continue to protect and enforce those rights. We are deeply grateful for your trust and support.”
We can bracket the change precisely from the Internet Archive: the last archived capture showing a working catalog is January 3, 2026, and the earliest capture showing this shutdown notice is March 8, 2026. No captures exist in between, so we do not assert a specific closure date. Product URLs and the cart on peptidesciences.com now redirect to this notice.
The company has not given a public reason. Industry coverage from Lumalex Law states plainly that “there has been no confirmed public explanation for why the company shut down.” Explanations circulating on peptide blogs — regulatory pressure, payment processing, a strategic exit — are speculation, and we are not going to repeat them here as fact. Researchers who want to check the regulatory record for any vendor can search the FDA warning letter database directly at fda.gov.
One point from the notice is worth restating for anyone shopping replacements: Peptide Sciences states that any party “claiming affiliation with Peptide Sciences, representing themselves as a successor to Peptide Sciences, or claiming to sell our products is unauthorized.” Pure U.S. Peptides makes no such claim. We are an unrelated supplier, not a successor, and we do not sell Peptide Sciences product.
Pure US Peptide vs. Peptide Sciences
Because the Peptide Sciences catalog is offline, its current terms cannot be verified. Rows below state only what is checkable as of July 31, 2026 — we have removed the catalog-size, COA, payment, and citation comparisons the previous version of this page asserted, because there is no longer a live source for any of them.
| Criterion | Pure US Peptide | Peptide Sciences |
|---|---|---|
| Selling status | Operating | Sales discontinued (per its own notice) |
| Catalog | 53 listings / 31 distinct research compounds | Offline — not available to review |
| COA availability | Lot-specific, on the product page — 37 of 53 listings; the other 16 show a pending-upload badge | Offline — not available to review |
| U.S. shipping | Same-day dispatch from U.S. fulfillment | Not shipping |
| Payment methods | Card, Zelle, Venmo, Cash App | Not accepting orders |
“In research-supply chain selection, qualified investigators consistently prioritize vendors that publish a lot-specific certificate of analysis on the product page itself, ship from a U.S. domestic warehouse, and hold their catalog to research-only positioning. Each criterion is independently auditable, and together they reduce variability in in-vitro work.”
Our research-peptide catalog — the workhorses
Pure US Peptide focuses on the compounds researchers actually request, validated to 99%+ HPLC purity. Certificate status is stated on each product page — most carry a lot-specific COA, and the ones still awaiting one say so. A few of the most-requested research molecules:
- • BPC-157 10mg — connective-tissue research workhorse
- • TB-500 10mg — actin-binding research peptide
- • Ipamorelin 10mg — selective ghrelin-receptor research compound
- • CJC-1295 + Ipamorelin blend — combination research blend
- • GHK-Cu 100mg — copper-tripeptide research compound
- • Tesamorelin 10mg — GHRH-analog research peptide
What Pure US Peptide offers
- Public COAs. 37 of our 53 listings publish the lot-specific certificate from an independent U.S. lab on the product page itself — the exact batch, on the SKU page, rather than a general archive or an email request. The remaining 16 show a visible pending-upload badge instead of a stand-in certificate.
- U.S. fulfillment. Same-day dispatch from a domestic warehouse, so there is no customs handling on a reorder.
- Card payments. Major-card checkout, plus Zelle, Venmo, and Cash App.
- Research-only positioning. Every product page, every blog post, every email is labeled for research use only. We do not market weight loss, performance enhancement, or any therapeutic benefit.
Ready to rebuild your supplier shortlist?
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