Peptide Therapy in California
Browse 35 verified peptide businesses in California — clinics, compounding pharmacies, research labs, and trusted suppliers. All listings are reviewed by the The Peptide Alliance editorial team.
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Top cities in California
Peptide Sciences
US-based research peptide supplier offering high-purity peptides synthesized domestically. Specializes in growth hormone peptides, weight loss peptides, and healing peptides backed by independent COAs.
Amino Asylum
US-based supplier offering research peptides with multiple domestic warehouse locations in TX and DE. Known for competitive pricing and product variety.
AminoVault
US-based research peptide and reagent supplier focused on COA transparency. All sourcing, testing, and fulfillment handled within the United States. Wholesale and bulk options available.
Peptide Systems
US-based supplier offering HPLC/LC-MS verified peptides at 99%+ purity, including BPC-157, TB-500, and Sermorelin. All products come with certified Certificates of Analysis from independent third-party labs.
Phoenix Pharmaceuticals
B2B peptide supplier based in Silicon Valley serving academic labs, biotech, and pharma companies since 1993. Manufactures research peptides, antibodies, and assay kits for preclinical research.
Pure Health Peptides
California-based LLC offering US-made, third-party tested research peptides including BPC-157 and TB-500 blends. Every batch is verified with COAs published on their site for full transparency.