Factory Supply L-Serine Pharmaceutical Grade Serine Powder with USP

Serine plays an important role in the catalytic function of many enzymes. It has been shown to occur in the active sites of chymotrypsin, trypsin, and many other enzymes. The so-called nerve gases and many substances used in insecticides have been shown to act by combining with a residue of serine in the active site of acetylcholine esterase, inhibiting the enzyme completely. 

Amino acids l-serine used as a biochemical reagent and Food Additives. Medicine used for amino acids on nutrition medicine,Nutritional supplement.





1:We have 20 years of experience in exporting products, strong market response capabilities and a wide range of trading partners.

2:We have a variety of certified factories to produce high quality products.

3:We offer full link hosted services from production to delivery.

4:We provide testing services prior to shipment of the product.

5: We will cultivate customers in every country market, let customers develop quickly with us, and win-win cooperation.

6:Stable supply, delivery on time, quality assurance




Question 1:Can you supply free samples ?
Answer:Because so many free sample orders everyday to us, sorry, we need to supply sample with charge, but sample charge can be deducted from future orders.Hope you can understand.

Question 2: How to assure your delivery same good quality as sample? 
Answer: We just take sample from mass production. So same production line,same quality. Even we can supply you preshipment batch sample approval. 

Question3. How to assure our delivery and quality after prepayment? If there is a dispute about quality etc, how to solve the problem?
Answer: We are committed to ingredient industry for nearly 20 years. Our products sold popular to European, american, russia and asian market.
The most important is pls book order directly in Alibaba order.You can get extra Ali trade assurance. Our current assurance limit is USD104000 and will still up in future.
We welcome use Trade Assurance, you'll enjoy:
100% product quality protection
100% on-time shipment protection
100% payment protection for your covered amount

Question 4:What kind of payment do you prefer?
Answer: We can accept TT, DP,LC,Westunion etc.
Payment