PRODUCT CENTER
About US
LongJi Peptide is a high-tech enterprise integrating R&D, production, and global trade, specializing in high-performance peptides and advanced biochemical ingredients. We are committed to empowering the global pharmaceutical, anti-aging research, and premium cosmetic industries with core raw material solutions.
Our product portfolio is centered on metabolic peptides, including Semaglutide, Tirzepatide, and the next-generation Retatrutide (RT Peptide). Concurrently, we possess mature mass-production technologies in the cosmetic peptide sector, such as Copper Peptide (CU Peptide), ensuring that our products reach industry-leading levels in terms of biological activity, stability, and purity.
R&D and Quality Excellence
Advanced purification and full-process inspection ensure high purity & consistent batches. Our technical team provides full test reports for reliable quality.
Other Steel Products
Our peptides meet global standards with complete compliance documents for customs clearance. Stable supply to over 30 countries, supporting full international trade solutions.
WHY CHOOSE US ?
Professional Peptide Manufacturer & Supplier
High Purit
Produced with advanced purification technologies to remove impurities efficiently. Our peptides reach 98%-99.5% purity, with HPLC test reports supplied for each batch.
Stable Quality
Strict testing procedures ensure batch-to-batch consistency. Full-process QA&QC inspection is carried out to avoid product fluctuations for long-term bulk orders.
Professional Manufacturing
Modern production facilities and experienced technical teams. We support mass production and custom peptide synthesis with standard clean workshops.
Global Service
Fast response and worldwide supply capability. We export to dozens of countries, offering quick quotation and flexible international logistics solutions.
News
![As Global Biotechnology Evolves, What Technological Trends Are Defining the Future of Top Peptide Factories?]( "As Global Biotechnology Evolves, What Technological Trends Are Defining the Future of Top Peptide Factories?")
Jun 27, 2026As Global Biotechnology Evolves, What Technological Trends Are Defining the Future of Top Peptide Factories?In 2026, the global pharmaceutical research and premium cosmetic ingredient sectors are undergoing a profound supply chain restructuring. Driven by an exponential surge in international demand for high-performance, high-purity peptide materials—including bulk research peptides, core metabolic research agents, and cosmetic peptide ingredients—traditional, low-efficiency, and high-energy manufacturing models are being rapidly phased out.Learn More +![How Can Research Labs Evaluate a Peptide Factory's Solid-Phase Synthesis Capabilities for Custom Sequences?]( "How Can Research Labs Evaluate a Peptide Factory's Solid-Phase Synthesis Capabilities for Custom Sequences?")
Jun 27, 2026How Can Research Labs Evaluate a Peptide Factory's Solid-Phase Synthesis Capabilities for Custom Sequences?In life sciences, immunology, and pharmacological mechanism research, institutions frequently require custom peptides with highly specific structures and complex sequences. Synthesizing these high-difficulty peptides—such as those featuring dense hydrophobic amino acid regions, multiple disulfide bonds, phosphorylation modifications, or exceptionally long peptide chains—poses immense chemical synthesis challenges.Learn More +![Planning Your Own Brand? What Full-Service OEM Solutions Can a Professional Peptide Factory Provide?]( "Planning Your Own Brand? What Full-Service OEM Solutions Can a Professional Peptide Factory Provide?")
Jun 27, 2026Planning Your Own Brand? What Full-Service OEM Solutions Can a Professional Peptide Factory Provide?Driven by the global surge in biotechnology and scientific skincare, the application of peptide raw materials (Peptides) has become increasingly widespread across metabolic health research, laboratory sciences, and premium cosmetic formulations.Learn More +![Why Do Advanced Peptide Factories Focus Heavily on Stabilizing Technology for Copper Peptide (AHK-Cu)?]( "Why Do Advanced Peptide Factories Focus Heavily on Stabilizing Technology for Copper Peptide (AHK-Cu)?")
Jun 27, 2026Why Do Advanced Peptide Factories Focus Heavily on Stabilizing Technology for Copper Peptide (AHK-Cu)?In the premium cosmetic and dermatological ingredient marketplace, Copper Peptide (frequently cataloged within the supply chain as CU Peptide or GHK-Cu) has long occupied a central position due to its unique, natural sky-blue hue and outstanding biological activity. However, for global procurers, Copper Peptide is also notoriously fragile.Learn More +
Welcome to write to us！
Dedicated to the development and manufacturing of high-purity peptides for research institutions, biotechnology companies, and laboratories worldwide.
Online Message
Thank you very much for writing to us. Please leave your message and contact information, we will reply to you within 24 hours.