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home > FAQ > Plant Extract > L-Tryptophan: Complete Guide to Benefits, Applications and Quality

L-Tryptophan: Complete Guide to Benefits, Applications and Quality

2026-04-22

What is L-Tryptophan?

L-Tryptophan is an essential amino acid that the body cannot produce on its own and must be obtained through diet or supplementation. It serves as the primary precursor for serotonin, melatonin, and niacin (Vitamin B3), making it crucial for mood regulation, sleep quality, and overall neurological health. L-Tryptophan is found naturally in foods such as turkey, chicken, eggs, and dairy products.

Key Benefits

  • Sleep Quality: As a precursor to melatonin and serotonin, L-Tryptophan may help support healthy sleep patterns and improve sleep onset and quality.

  • Mood Support: Serotonin production depends on adequate tryptophan availability, supporting healthy mood, emotional balance, and overall well-being.

  • Stress Management: May help support the body's natural stress response and promote feelings of calm relaxation.

  • Cognitive Function: Supports healthy neurotransmitter balance, contributing to mental clarity, focus, and cognitive performance.

  • Appetite Regulation: Serotonin plays a role in appetite control and may help support healthy eating patterns.

Product Specifications

SpecificationDetails
Chemical NameL-Tryptophan
CAS Number73-22-3
Molecular FormulaC11H12N2O2
Molecular Weight204.23
Purity≥99% (HPLC)
Test MethodHPLC/USP
AppearanceWhite crystalline powder
SolubilitySparingly soluble in water
StorageStore in cool, dry place, away from light
Shelf Life24 months
Packaging25kg/drum or customized

Applications

  • Dietary supplements for sleep and mood support

  • Stress management formulations

  • Sports nutrition products

  • Pharmaceutical formulations

Quality Standards

  • Manufactured in GMP-certified facility

  • Third-party lab tested for identity, potency, and purity

  • Free from heavy metals, pesticides, and microbial contamination

  • Compliant with USP, EP, and CP standards

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