Manufacturers List

L-Tryptophan

L-Tryptophan is a food-grade essential amino acid used in dietary supplements, animal feed, and pharmaceutical applications as a serotonin precursor. We supply bulk L-Tryptophan sourced from leading China manufacturers, available in powder form for international food processing operations. Our L-Tryptophan is widely used in mood enhancement dietary supplements, swine and poultry, depression and insomnia, amino acid infusion solutions and beverage development.

Kosher Halal ISO 9001 BRC
CAS No.
73-22-3
HS Code
293399

L-Tryptophan is an essential amino acid and the metabolic precursor to serotonin, melatonin, and niacin (vitamin B3). It is the least abundant essential amino acid in most dietary proteins, making supplementation important for specific nutritional applications.

In the supplement industry, L-Tryptophan is widely used for mood support, sleep aid, and stress management formulations. It is produced through microbial fermentation using genetically optimized bacterial strains for high-yield tryptophan biosynthesis. L-Tryptophan's role in animal nutrition has also grown significantly, as it is recognized as the second limiting amino acid in corn-soybean meal diets for swine.

  • Sleep support and mood enhancement dietary supplements
  • Animal feed supplementation for swine and poultry
  • Pharmaceutical preparations for depression and insomnia
  • Clinical nutrition and amino acid infusion solutions
  • Functional food and beverage development
  • Pet food and specialty animal nutrition formulations

Grades / Types Available: Food Grade, Feed Grade

Item Specification
Appearance White to yellowish-white crystalline powder
Assay ≥98.5%
Specific Rotation [α]D20 -30.0° to -33.0°
Loss on Drying ≤0.5%
Residue on Ignition ≤0.1%
pH (1% solution) 5.5–7.0
Heavy Metals (as Pb) ≤10 ppm
Arsenic ≤1 ppm
Ammonium ≤0.02%
Total Plate Count ≤1000 CFU/g
Purity (Food Grade) 98% min
Moisture/Loss on Drying < 0.5%
Ash < 0.1%
Lead < 1 ppm
Yeast & Mold < 100 cfu/g
L-Tryptophan packaging

MOQ

Our MOQ for bulk food/feed ingredient is generally 500 kg. We also support mixed containers — combine L-Tryptophan with other food ingredients in one shipment to save on freight.

Samples

We provide free samples (100–500g) for quality testing before you place a bulk order. The buyer covers shipping costs only. Samples are typically dispatched within 2–3 business days.

Lead Time

Standard lead time is 7–15 days after order confirmation and payment. For stock items, delivery can be faster. We will confirm the exact timeline before you place the order.

Documents

You will receive the original COA (Certificate of Analysis), COO (Certificate of Origin), MSDS, TDS, and relevant certifications directly from the manufacturer. We guarantee full document authenticity and traceability.

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