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Home Nutrition enhancers L-Tryptophan
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L-Tryptophan, CAS# 73-22-3, L-Tryptophan Powder is an amino acid, a protein building block that can be found in many plant and animal proteins. L-Tryptophan Powder is called an "essential" amino acid because the body can’t make it. It must be acquired from food.

Fooding is a L-Tryptophan Manufacturers, Suppliers and Wholesalers in China. You can inquiry L-Tryptophan price by email us: or leave message on the Fooding web. Fooding ensure you can buy L-Tryptophan with a good price.

Discount Prices Available for Larger Orders.



  • CAS No:73-22-3
  • Einecs No:73-22-3
  • HS Code:29339990
  • Routine Packing:25 kg/bag
  • Place of origin:China
  • QC:Haccp, Kosher, Hala,Iso
  • Payment terms:T/T or L/C
  • Port of dispapch:Shanghai,Tianjin,Qingdao
  • Function:L-Tryptophan Powder is used for insomnia, sleep apnea, depression, anxiety, facial pain, a severe form of premenstrual syndrome called premenstrual dysphoric disorder (PMDD), smoking cessation, grinding teeth during sleep (bruxism), attention deficit-hyperactivity disorder (ADHD), Tourette's syndrome, and to improve athletic performance.
  • Tel: +86-21-50321522
  • Fax: +86-21-51069122
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  • Product Information

    Product Description
    Safety Ratings Key
    Gluten free
    Appearance White to Yellowish White Crystals or Crystalline Powder
    Identification Infrared Absorption
    Assay 98.5%~101.5%
    Specific Rotation -29.4º~-32.8º
    PH 5.5~7.0
    Loss on Drying 0.30%
    Residue on Ignition 0.10%
    Chloride(Cl) 0.05%
    Sulfate(SO4) 0.03%
    Iron(Fe) 0.003%
    Heavy Mental(Pb) 0.0015%
    Organic Volatile Impurities Meets the Requirements


    About L-Tryptophan

    L-Tryptophan is one of essential amino acids and the fourth limiting amino acid in animal diets, which means it could not be synthesized by the body, in addition, dietary supply through feed materials is usually insufficient. The deficiency of L-Tryptophan was generally characterized as decreased feed intake and efficiency, and slow growth rate. Considering L-Tryptophan playing a key role in growth performance and feed efficiency, it is recommended to add L-Tryptophan in diet to achieve the optimal amino acid balance and fulfill the digestible tryptophan requirement of animals, especially piglets, sows and poultry etc.

    L-Tryptophan 98.5% (Feed Grade) is a fermentation product from natural raw materials as nutritional additives for feedstock. Thanks for the state-of-the art fermentation technology and high level quality control system, we can offer our tryptophan in high purity above 98.5% and consistent quality for animal feed.

    References on L-Tryptophan

    [1]. Deslouches B, Hasek ML, Craigo JK, Steckbeck JD, Montelaro RC. Comparative functional properties of engineered cationic antimicrobial peptides (eCAPs) consisting exclusively of tryptophan and either lysine or arginine. J Med Microbiol. 2016 Apr 5.

    [2]. Lovelace MD, Varney B, Sundaram G, Lennon MJ, Lim CK, Jacobs K, Guillemin GJ, Brew BJ. Recent evidence for an expanded role of the kynurenine pathway of tryptophan metabolism in neurological diseases. Neuropharmacology. 2016 Mar 16. pii: S0028-3908(16)30096-X.

    [3]. Sicoli G, Mouesca JM, Zeppieri L, Amara P, Martin L, Barra AL, Fontecilla-Camps JC, Gambarelli S, Nicolet Y. Fine-tuning of a radical-based reaction by radical S-adenosyl tryptophan lyase. Science. 2016 Mar 18;351(6279):1320-3.

    [4]. Santos T, Carvalho J, Corvo MC, Cabrita EJ, Queiroz JA, Cruz C. l-tryptophan and dipeptide derivatives for supercoiled plasmid DNA purification. Int J Biol Macromol. 2016 Jun;87:385-96.


    Support & FAQs

    1. What's your payment terms?

    T/T or LC.

    2. What's your delivery time?

    Usually we will arrange the shipment in 7 -15 days.

    3. How about the packing?

    Usually we provide the packing as 25 kg / bag or carton. Of course, if you have special requirements on them, we will according to you.

    4. How about the validity of the L-Tryptophan?

    According to the L-Tryptophan you ordered.

    5, What is the MOQ of L-Tryptophan ?

    Different products have different MOQ, for L-Tryptophan , the MOQ is 1000kg.

    6, What is the price of L-Tryptophan ?

    Fooding has been corporate with many L-Tryptophan manufacturers for several years, we can provide you with best price of L-Tryptophan.

    7, How long shall we wait for your reply?

    We can guarantee to reply your inquiries of L-Tryptophan in one working days.

    8. What documents you provide?

    Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificat and Origin certificate. If your markets have any special requirements, let us know.

    9. What is loading port?

    Usually is Shanghai or Qingdao.


    Our Services
    1. Supply high quality products with a reasonable price in additives industry.
    2. Arrange the orders and shipping with cus requests in time, According to the different countries export policy provide complete customs clearance documents.
    3. Provide agile and safe payments.
    4. We can in charge of all if our products have quality problems.
    5. Provide a price trend, ensure the clients can know about  marketing informations in time.
    6. Have offices at Mexico, Clients can get our company information from here, discuss the prices and delivery time face to face.