Is Core Peptides legit?
Core Peptides is an established U.S. research-supply vendor. Its homepage states it has been "serving the research community for over 7 years," its products are "3rd party tested," and its About page says its peptides are "synthesized and lyophilized in the United States, with purity levels exceeding 99%+" (reviewed August 1, 2026). Its product pages carry a Certificate of Analysis tab, and its catalog is labeled for "research, laboratory, or analytical purposes only." We compete with Core Peptides; we are not going to tell you it is a bad vendor, because the evidence does not support that.
Where is Core Peptides based?
In the United States. Core Peptides' own About page describes it as "a leading provider of high-quality peptides for laboratories, researchers, and academic institutions within the United States" and states that "all our products are synthesized and lyophilized in the United States" (reviewed August 1, 2026). Pure US Peptide is likewise U.S.-based, with same-day dispatch from a domestic warehouse. On country of origin, the two vendors are at parity.
Does Core Peptides publish a COA on each product page?
Yes. Core Peptides product pages include a "Certificate of Analysis" tab showing a certificate image for each product size — for example, its BPC-157 listing displays separate certificates for the 5mg and 10mg presentations (reviewed August 1, 2026). This is a genuine strength, and on the listings where we publish one it is a point of parity rather than a difference: 37 of our 53 listings carry a certificate on the product page, and the other 16 display a "pending upload" badge under batch analysis. Where ours is published it is tied to the specific lot shipped, so a researcher can match the document to the vial received.
How big is the Core Peptides catalog?
Core Peptides' peptides category listed 104 products when reviewed on August 1, 2026 — "Showing all 104 results" — spanning standard peptides, blends, and topical peptides. That is materially broader than our 53 listings across 31 distinct compounds. If breadth is your priority, that is a real advantage for Core Peptides.
How is Pure US Peptide's catalog different from Core Peptides?
Pure US Peptide lists 53 products covering 31 distinct compounds, 10 of the listings being bundles or blends — a deliberately narrow selection of the workhorses used by independent labs. All are 99%+ HPLC-verified, 37 of the 53 publish a lot-specific certificate on the product page itself, and product pages carry PubMed-linked research data covering mechanism, structure, and storage. The trade-off is explicit: fewer compounds, more documentation per compound.
What payment methods does Pure US Peptide accept?
Pure US Peptide accepts major card (PSiFi processing), Zelle, Venmo, and Cash App. All transactions are research-only.
How fast does Pure US Peptide ship?
Pure US Peptide dispatches same-day on orders placed during U.S. business hours from a domestic warehouse, with typical 2-3 business day continental U.S. transit. Core Peptides ships within the USA and states that "any purchase of $200 or more qualifies for free delivery within the USA" (reviewed August 1, 2026) — a free-shipping threshold we do not currently match.
Are these compounds for human use?
No. All compounds sold by Pure US Peptide are intended exclusively for in-vitro research and laboratory use by qualified investigators. They are not intended for human or veterinary consumption.
