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Your peptide catalog

Research use only. Full access unlocked. Browse SKUs below or ask the assistant for specifics.

🧪 Free reconstitution liquid (BAC water, benzyl alcohol or acetic acid) is included with every order — matched to your quantity. Choose which one at checkout.

All Kay Bio Labs peptides are standard grade at 99.98% purity, verified per batch.
Third-party COA on every batch
US-based since 2020
Free US shipping · tracking # within 1–3 days
Free reconstitution liquid included with every order
Lost or wrong order? We reship — guaranteed
Save 10% on your first order
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Why researchers choose Kay Bio Labs

Verified purity

A third-party Certificate of Analysis on every batch — lot number, purity percentage, and identity confirmation. Ask for the COA on any product.

US-based since 2020

Shipped from within the United States with tracking on every order. No mystery packages from overseas, no customs limbo.

Backed shipments

Free US shipping on every order. If a package is lost in transit or the wrong item ships, we reship it — no cost to you.

Research Peptides & Reagents — US Supplier

Kay Bio Labs is a US-based supplier of research-grade peptides and reagents for laboratory and in-vitro study. Every batch ships with a third-party Certificate of Analysis (COA) so purity can be independently verified, and orders ship fast from within the United States. Products are available as single vials or as discounted 10-vial kits for labs running longer studies. For laboratory research use only. Not for human consumption.

What we carry

Our catalog spans metabolic and GLP research compounds including Retatrutide, Tirzepatide, Semaglutide, Cagrilintide, Survodutide, Mazdutide, Liraglutide and Dulaglutide; healing and recovery research peptides such as BPC-157, TB-500, KPV, LL-37 and Thymosin Alpha-1; growth-hormone-secretagogue research compounds including Ipamorelin, CJC-1295, Sermorelin, Tesamorelin, GHRP-2, GHRP-6, MK-677 and HGH 191AA; and longevity and cellular research reagents such as Epithalon, NAD+, MOTS-C, SS-31, 5-Amino-1MQ, GHK-Cu and Glutathione. We also stock research staples like PT-141, Melanotan I and II, Semax, Selank, DSIP, AOD-9604, IGF-1 LR3, and bacteriostatic (BAC) water for reconstitution.

Why researchers choose Kay Bio Labs

Third-party COA on every batch, transparent batch/lot documentation, US shipping with tracking on every order, and per-vial savings on bulk kits. Certificates of Analysis are available on request for any listed compound.

All products are sold strictly for laboratory research use only. Nothing on this site is intended for human or veterinary use, and no medical claims are made about any compound.