One of the cleanest research-peptide suppliers we've looked at: 99%+ HPLC-verified purity, a third-party COA on every batch, fast US shipping from a real Fresno lab — and something almost nobody in this space offers, a phone and text line answered by actual people.
Three things put CD Biolab near the top of our list. First, testing you can actually see — every batch is third-party HPLC and mass-spec tested to a 99%+ purity standard, with a COA you can request before ordering rather than after. Second, real US fulfillment from a Fresno, California lab, which means fast domestic shipping and, for local researchers, the option to pick up in person. Third — and this is genuinely rare — a phone and text line answered by real people. Most vendors hide behind a contact form; CD Biolab will talk you through a compound or an order in real time.
The catalog covers everything a research buyer typically wants, and it's especially strong on the high-demand stacks the community searches for by name: the Wolverine Stack (BPC-157 + TB-500), GLOW, and KLOW, alongside the full GLP-1 line (semaglutide, tirzepatide, retatrutide).
Researchers who value transparency and speed, want batch-level COA access, and appreciate being able to reach a human before they buy. If you're comparing options, CD Biolab is one of the easiest to recommend — see our ranking methodology for how we weigh purity, COAs, reputation, shipping, and support.
Order directly from CD Biolab below. Every order ships from their Fresno lab with a third-party COA, sold strictly for laboratory and research use — not for human consumption.
Prices are per vial and change often; CD Biolab confirms final pricing and the current-batch COA on every order. Products listed are for laboratory and research purposes only — not for human consumption.
Send a quick question or request a COA and CD Biolab will get back to you the same day. Prefer to talk? Call or text (559) 939-5274.
Yes — it's a US-based research-peptide supplier shipping from a Fresno, California lab, with 99%+ HPLC-verified purity, a third-party COA on every batch, and real phone/text support. It's one of the more transparent operators we've reviewed.
Yes — a third-party Certificate of Analysis is provided with every batch, and you can request the current-batch COA before you order. New to COAs? See our guide to reading a COA.
Typically 1–3 business days within the US from their Fresno lab. Local researchers in the Fresno area can arrange pickup.
Yes — call or text (559) 939-5274, or use the form above. CD Biolab answers questions and confirms availability and pricing the same day.
No. We're an independent research and comparison resource. We link to vetted vendors and disclose material connections per FTC guidelines.
Last reviewed June 2026. By the Peptides Uncaged Research Team. We update vendor scores as new testing and reputation data come in.