Thymulin!

Peptide API Manufacturer & Supplier in China | Cosmetic Peptides | Custom Peptide Synthesis
Company Introduction
Shenzhen Zhaoke Biotechnology Co., Ltd. (Zhaoke Biotech), founded in 2025 and based in Shenzhen, China, is a peptide API manufacturing and sourcing company serving global B2B customers. We specialize in peptide raw materials, cosmetic peptides, pharmaceutical peptide APIs, research peptides, bioactive ingredients, and custom peptide synthesis.
Our portfolio covers 496+ peptide products and related raw materials across six categories: cosmetic, pharmaceutical, nutrition, sports & fitness, personal care, and pet care. Our main product lines include:
GLP-1 and metabolic peptide raw materials: Semaglutide, Tirzepatide, Retatrutide, Cagrilintide, Mazdutide, Survodutide, and related peptides.
Cosmetic and personal-care peptides: GHK-Cu (Copper Tripeptide-1), AHK-Cu, Palmitoyl Pentapeptide-4, Acetyl Hexapeptide-8, Acetyl Octapeptide-3 (SNAP-8), Syn-AKE, and other anti-wrinkle, repair, brightening, hair, scalp, and lash-care peptides.
Bioactive ingredients: NMN, NAD+, Glutathione, Ectoin, Alpha-Arbutin, Niacinamide, Sodium Hyaluronate, and selected complementary actives.
Research and custom peptides: Catalog peptides, modified peptides, and specification-based custom synthesis for laboratory and professional applications.
We combine in-house R&D, pilot-scale, and QC capabilities with a manufacturing partner network. For defined product lines, we support solid-phase peptide synthesis (SPPS), preparative HPLC purification, lyophilization, and analytical testing. For projects requiring GMP production, we coordinate with GMP manufacturing partners. The production model, grade, specification, and available regulatory documentation are confirmed for each product and project.
Quality documentation includes batch-specific COA. HPLC purity, LC-MS identity, water content, and other analytical items are provided according to the agreed product specification. SDS/MSDS, TDS, customized specifications, and additional analytical testing are available upon request and subject to product availability.
We support requirements from milligram and gram evaluation quantities to kilogram and multi-kilogram supply, depending on the molecule. Our services include custom peptide synthesis, specification-based sourcing, flexible packaging, international delivery, and temperature-controlled packaging where required.
Research-grade products are supplied for laboratory research use only and are not intended for human or veterinary use. All products and services are subject to applicable regulations, product-specific review, and customer qualification.
Zhaoke Biotech aims to be a reliable peptide API supplier and long-term sourcing partner for pharmaceutical companies, cosmetic manufacturers, laboratories, distributors, and other qualified professional customers.