Premium L-Tryptophan Powder 99% | Essential Amino Acid Supplement for Sleep & Mood Support

Shaanxi Hongda Phytochemistry is a major producer and supplier of L-Tryptophan Powder, high quality to the customers all over the globe since 2001. Our 20,000 square meter contemporary facility with more than 10 manufacturing lines and 100,000-level purification workshops ensure 99% pure product with all Certifications such as Kosher, Halal, cGMP, FSSC22000, ISO9001, ISO22000. With our yearly production capacity of 3,000 tonnes, SGS standardised laboratory testing and thorough quality control of heavy metals, pesticide residues and microbiological parameters, assist your product development. We provide fast 3-7 day lead times with complete traceability, guaranteeing that you obtain pharmaceutical quality amino acids that exceed international requirements for nutritional supplements and functional food applications.

Product Introductions

The product is 100% necessary amino acid your body requires from meals for maximum wellbeing. This white crystalline powder is the biological precursor of serotonin, melatonin and niacin (vitamin B3), which control mood, sleep and brain function. Our pharmaceutical grade is 99% pure, CAS No. 73-22-3 and meets AJI and USP standards. All manufacturing batches are subjected to rigorous checks for enantiomeric purity to ensure the physiologically active L-form and no D-tryptophan.

L-Tryptophan Powder

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Product Specification

30 years amino acid manufacturer

Item of Test	Limits of Test	Results of Test
Appearance	White Powder	Conforms
Assay (HPLC)	≥99%	99.69%
Particle	100% pass 80 mesh	Conforms
Odor	Odorless	Conforms
As	<10%	Conforms
Pb	<1.0ppm	Conforms
Cd	<3.0ppm	Conforms
Hg	<0.05ppm	Conforms
Loss on drying	<0.1mg/kg	Conforms
Total Plate Count	<0.5%	0.35%
Yeast & Mold	<1000cfu/g	95cfu/g
E. Coli	<100cfu/g	33 cfu/g
S. Aureus	Negative	Absent
Saimonella	Negative	Absent
Pesticides	Negative	Absent

Conclusion

Conform with specification

L-Tryptophan Powder Advantages

Pharmaceutical-Grade Purity: Our minimum 99% assay ensures maximised bioavailability with less than 0.1% D-tryptophan contamination, crucial for mood and sleep therapies.

Rigid moisture control (LOD <0.5%) inhibits degradation and caking during storage, ensuring product potency throughout shelf life.

Comprehensive Safety Testing: We test each batch for over 500 different pesticides, heavy metals, and diseases. You will get paperwork that may be used for regulatory submissions in worldwide markets.

Fast Lead Time – 3-7 days lead time with 3,000 tons/year capacity offers steady supply for your production schedules without the burden of minimum order quantity.

L-Trytophan Benefits

Application of L-Tryptophan Powder

Sleep Support Formulations: Frequently included to sleep aid supplements in doses of 500-1000mg that naturally convert to melatonin to support quality and length of sleep.

Mood Enhancement Products: Needed for the generation of serotonin that makes it useful in stress reduction, mood balancing and mental health formulations for anxiety and depression support.

Sports Nutrition: Added to recovery formulae and bedtime supplements, helping athletes to synthesise protein and optimise the release of growth hormone during sleep.

Functional Foods & Beverages: Add L-Tryptophan Powder to protein bars, wellness beverages and nutritional powders that are formulated for relaxation and cognitive health advantages.

Why Choose Us

Factory

At Shaanxi Hongda we don’t only supply raw materials, we deliver collaboration. We have a 23 year legacy of manufacture that blends traditional quality workmanship with state of the art analytical capability. You will have a solid supply chain partner with three specialised planting bases to ensure the traceability of raw materials, 100,000-level clean rooms to avoid contamination, and several international certifications to access global markets. We have an average client retention of over 90% because we recognise your success relies on continuous quality, straightforward interaction, and technical assistance throughout product development. More than 150 highly trained technicians and customer care reps provide fast, knowledgeable help for any enquiries.

Manufacturing Process

Step 1 - Fermentation Extraction: We initiate production using non-GMO bacterial fermentation with carefully selected L-tryptophan-producing strains, resulting in high-purity amino acid biomass with minimal environmental impact.

Step 2 - Purification & Crystallisation: The fermentation broth is passed thru several stages of filtration, followed by ion-exchange chromatography and controlled crystallisation to achieve 99%+ pharmaceutical-grade purity and endotoxin removal.

Step 3 - Drying & milling: The crystals are vacuum dried at regulated temperatures below 60°C to avoid thermal deterioration and milled to uniform particle size (80-120 mesh) for good dissolving qualities.

Step 4 - Quality Testing & Packaging: Each batch undergoes comprehensive testing in our SGS laboratory for identity, purity, heavy metals, and microbiology before packaging in double-layer PE bags within fiber drums under nitrogen atmosphere.

Third Test Report

Independent Laboratory Certification of the Following: We work with globally recognised third-party testing companies such as SGS and Eurofins to ensure product integrity. Recent batch analysis confirmed compliance with all key safety requirements.

Heavy Metal Analysis by ICP-MS approach : Lead (Pb) <1ppm, Arsenic (As) <0.5ppm, Mercury (Hg) <0.1ppm, Cadmium (Cd) <0.5ppm.

Pesticide Residue Test: Thorough screen for over 500 pesticides at non-detectable levels to fulfil EU regulatory limits for dietary supplements.

Microbiological Safety: Total Plate Count <1000cfu/g, Yeast & Mould <100cfu/g, absence of Salmonella, E. coli and Staphylococcus aureus verified.

Laboratory

OEM / ODM Support

Custom Formulation Development: Our 20+ professor level R&D team works with you to develop customised mixes combining L-Tryptophan with complementing compounds such as magnesium, B-vitamins or plant extracts for targeted health solutions.

Flexible Packaging Options Custom packaging options from bulk 25kg drums all the way to consumer-ready sizes like as capsules, pills, sachets and premixed powders with your own labelling and branding standards.

Full Documentation Support: You will obtain complete regulatory paperwork including COAs, allergy declarations, BSE/TSE certifications and stability data to speed up your product registration and market access internationally.

Production Runs that Scale: We have the infrastructure that can scale to your company development curve whether you require tiny pilot batches for market testing or big scale production runs of hundreds of tonnes weekly.

OEM Service

FAQ

Q: What is the minimum order quantity for the product?

A: MOQ is variable from 25kg, special price above 500kg order is acceptable.

Q: How do you maintain the product’s stability throughout international shipping?

A: Our double-layer PE packing within fibre drums as well as nitrogen flushing avoids moisture absorption and oxidation during transport for up to 24 months.

Q: Can I have a sample for test before bulk order?

A: Yes, we can provide 100-500g samples in aluminium foil wrapping with complete COA paperwork, usually dispatched within 48 hours.

Q: Is your L-Tryptophan acceptable for the fortification of vegan food supplements?

A: Absolutely. Our fermentation-derived technique is free from any animal-derived elements and is certified VEGAN, so it may be used in vegetarian applications.

Q: What documents do you give for clearance at customs?

A: We can provide commercial invoice, packing list, COA, health certificate, non-GMO declaration and country specific certificates as needed.

Contact Us

Ready to elevate your product formulations with premium L-Tryptophan Powder? Contact Us today at duke@hongdaherb.com for quotations, samples, or technical consultations.