NAD+ NJ1000 Quality Guarantee After Sales Assured Factory direct

Company Introduction

Qingdao Fengxi Biotechnology Co., Ltd.is a professional manufacturer and supplier specializing in high-purity peptide products and fine chemical raw materials. We integrate independent research and development, production, sales and global logistics to provide stable, reliable and cost-effective products for customers worldwide.

We own a professional R&D team and a mature international logistics system, ensuring stable product quality, safe packaging and fast delivery. Our products are widely exported to the United States, Europe, Japan, South Korea, India and other regions. Most mainstream peptide products are always in sufficient stock and support immediate shipment. We sincerely welcome global customers to inquire and customize, and we will provide you with the most competitive quotation based on your purchasing quantity.

Our peptide products are widely applied in life science research, pharmaceutical development, cosmetic raw materials, anti-aging industries and functional health fields. All products maintain stable purity and superior quality with favorable market prices. Our long-term cooperative customers have always given positive feedback on product quality, stability and after-sales service.


1. Superior Product Quality 

Quality control is our core advantage. All peptides are synthesized by advanced solid-phase peptide synthesis (SPPS) technology, strictly purified by HPLC high-performance liquid chromatography and fully tested and verified by MS mass spectrometry.

Every batch of goods comes with complete official COA (Certificate of Analysis), including full test data:

- HPLC purity
- MS molecular weight confirmation
- Moisture / water content
- Residual solvent test
- Microbial limit test (as required)


For customers with high-standard laboratory and regulatory requirements, we can also provide third-party independent test reports, LAL endotoxin data and stability test documents.


2. Customization & R&D Support 

We provide flexible one-stop custom synthesis services, supported by an experienced technical R&D team. We support customized peptide sequences, cosmetic-grade customized purity and various molecular modification technologies such as acetylation and PEGylation.


Our main technical services cover:

- Custom peptide synthesis (mg to kg large-scale production)
- Peptide modification and marker customization
- Small molecule compound synthesis
- New product research, project development and production scale-up


We always communicate closely with customers to ensure technical rationality, stable quality, fast cycle and reasonable cost control in the whole development process.


3. Wide Product Portfolio 

We own a complete and continuously updated product line to meet diversified market demands:

- Research peptides & GLP-1 series: Semaglutide, Tirzepatide, Retatrutide and other weight-loss & blood-sugar regulating analog peptides
- Cosmetic peptides: Acetyl Hexapeptide-8, Matrixyl and anti-aging skin care peptides
- Anti-aging health raw materials: NMN, NR, NADH and NAD+ booster series
- Biochemical raw materials: Amino acid derivatives, enzyme materials and laboratory custom reagents

We continuously launch new products to follow the latest market trends, and support long-term batch reservation and stable supply for regular customers.