Quantai | Custom Peptide Manufacturing & CDMO Services

From R&D-grade to GMP peptides, tailored to your project requirements.

Experts in peptide-drug conjugates, PEGylation, lipidation, and protein coupling.

Reliable quality systems and documentation for commercial needs.

Structural optimization for stability, bioactivity, and formulation compatibility.

Fluorescent, isotope, biotin, and enzyme-linked peptide labeling services.

Custom solutions in peptide synthesis, process development, and GMP manufacturing.

Cagrilintide Dihexa Anti-inflammatory Peptides Peptide Label Targeting Peptide Peptide Synthesis Peptide Conjugates

Featured Single Peptides

Hot Products

Quantai specializes in custom peptide synthesis, research peptides, cosmetic peptides, and API-grade peptide manufacturing for global B2B partners.

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Single Peptide

Single Peptides

Retatrutide (5 mg Vial)

Complete dosage protocol and reconstitution guide for Retatrutide (5 mg Vial). Review reconstitution steps, storage guidance, syringe units, and research-use notes.

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Single Peptide

Single Peptides

Tirzepatide (5 mg Vial)

Complete dosage protocol and reconstitution guide for Tirzepatide (5 mg Vial). Review reconstitution steps, storage guidance, syringe units, and research-use notes.

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Single Peptide

Single Peptides

GHK-Cu (50 mg Vial)

Complete dosage protocol and reconstitution guide for GHK-Cu (50 mg Vial). Review reconstitution steps, storage guidance, syringe units, and research-use notes.

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Single Peptide

Single Peptides

Retatrutide (10 mg Vial)

Complete dosage protocol and reconstitution guide for Retatrutide (10 mg Vial). Review reconstitution steps, storage guidance, syringe units, and research-use notes.

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Single Peptide

Single Peptides

Tirzepatide (10 mg Vial)

Complete dosage protocol and reconstitution guide for Tirzepatide (10 mg Vial). Review reconstitution steps, storage guidance, syringe units, and research-use notes.

View Product

Single Peptide

Single Peptides

GHK-Cu (100 mg Vial)

Complete dosage protocol and reconstitution guide for GHK-Cu (100 mg Vial). Review reconstitution steps, storage guidance, syringe units, and research-use notes.

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Single Peptide

Single Peptides

Retatrutide (20 mg Vial)

Complete dosage protocol and reconstitution guide for Retatrutide (20 mg Vial). Review reconstitution steps, storage guidance, syringe units, and research-use notes.

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Single Peptide

Single Peptides

Tirzepatide (15 mg Vial)

Complete dosage protocol and reconstitution guide for Tirzepatide (15 mg Vial). Review reconstitution steps, storage guidance, syringe units, and research-use notes.

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Research Areas

Whether you're developing targeted therapies, studying disease mechanisms, or advancing skin science, our expertise in peptide synthesis, modification, and labeling helps bring your research closer to clinical translation.

Explore more peptide applications across infectious diseases, cardiovascular disorders, autoimmune conditions, and more on our full disease area page.

Looking for something specific? For faster assistance.

Cancer Research

Alzheimer's Disease

Peptides in Diabetes

Immunotherapy & Cell Therapy

Our Services

Quantai offers a comprehensive range of peptide services, including screening, design, synthesis, modification, and analysis. Our streamlined solutions are tailored to meet diverse research and development needs.

Custom Peptide Design

Peptide Synthesis Services

Custom Conjugation Service

Peptide Modification Services

Peptide Analysis Services

Our Products

APIs

Quantai supplies peptide solutions used as pharmaceutical agents, API-related research compounds, and development-stage materials.

Cyclic Peptides

We support custom cyclic peptide synthesis, characterization, modification, and application-oriented development.

Peptide Inhibitors

Peptide inhibitors offer affinity, specificity, and flexible development value for advanced biological research workflows.

Antimicrobial Peptides

Functional antimicrobial peptides are available for research, screening, and custom sequence development.

Cell Penetrating Peptides

Cell-penetrating peptide solutions support intracellular delivery and related scientific research programs.

MHC-Peptide Tetramer

MHC-peptide tetramer support helps immunology teams with antigen-specific T-cell analysis and discovery.

Explore our peptide product catalog featuring custom peptides for research, drug development, and more. Synthesis, purification, and modifications available.

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About Us

Quantai Co., Ltd. is a Guangzhou-based peptide manufacturer founded in 2003. Backed by a 350+ person team with strong R&D capability, we provide custom peptides, research peptides, cosmetic peptides, and pharma/API-grade peptide solutions for global distributors, research institutions, and B2B buyers across 32 countries and regions.