About PeptideScientists.com

Peptide Scientists is an independent buying guide for premium peptides. We are not owned by, merged with, or compensated as a sales arm of any pharmaceutical manufacturer. We run one catalog: the peptides our partner supplier actually ships, priced at what they actually cost, reviewed against documented product quality standards.

The site grew out of a narrower tirzepatide-focused project and has since expanded to cover the full category — retatrutide, semaglutide and cagrilintide on the GLP side; BPC-157, TB-500 and GHK-Cu on the recovery and skin side; CJC-1295 and ipamorelin for growth hormone secretagogue use; NAD+, epithalon and Khavinson bioregulators for longevity; plus SNAP-8, melanotan II and the niche peptides customers actually want.

We keep product pages practical and easy to compare. Listings include concentration, vial size, pricing, shipping expectations, and lot-based documentation where available. The goal is simple: help buyers understand what they are ordering before checkout.

We also keep product and category pages updated as stock, pricing, and catalog details change. When a product is discontinued or replaced, we update links quickly to prevent dead-end pages.

We source the entire catalog from Phiogen, a Reykjavík-based peptide manufacturer that publishes lot-specific certificates of analysis, runs ≥98% HPLC purity as its floor (not its ceiling), and ships cold-chain where the compound requires it.

We chose Phiogen over alternatives because: (1) the CoAs are lot-traceable and auditable, (2) the purity claims survive third-party re-testing, and (3) the Icelandic regulatory environment produces a more reliable compliance track record than the typical peptide supply chain. Whatever vendor you use — ours or someone else's — cross-reference the CoA against an independent HPLC dataset before committing to a purchase.

• US-side fulfillment — 1–2 business day handling, then 2–5 day USPS or UPS transit, tracked.
• Free shipping on orders over $200. Flat-rate shipping under that threshold.
• 30-day returns on unopened, sealed vials. Damaged-in-transit orders replaced at no cost.
• Cold-chain handling for compounds that require it. Lyophilized powder products ship ambient; reconstituted products are not stocked.

We maintain a commercial partnership with the peptide supplier whose catalog we feature. When you click out from a product page and complete a purchase, we may earn a commission at no additional cost to you. Those commissions fund the editorial work — product updates, catalog maintenance, and CoA checks.

Partnership doesn't guarantee a positive review. We'll note deficiencies where they exist — discontinuations, price jumps, lot-to-lot variance — and the catalog surface reflects what we'd actually order ourselves.

All products referenced on this site are sold as non-medical compounds. They are not intended for human consumption, injection, or therapeutic use. Nothing on this site is medical advice.

Information presented here is informational only. Buyers are solely responsible for complying with local, state, and federal regulations in their jurisdiction.

We handle support through our product and category pages — if you hit a snag with an order, a certificate of analysis question, or a citation you want to chase down, reach out through the product catalog or the vendor-side support channel on the checkout page. We read the inbox.