Name: China Chemical Manufacturer Supply High Quality L-Tryptophan CAS 73-22-3 with good service
Brand: Wuhan Fortuna Chemical Co., Ltd.

Specifications of L-Tryptophan CAS 73-22-3

Item	Specifications	Results
Appearance	White crystals or crystalline powder	Conforms
Assay	98.5% ~101.5%	99.4%
Loss on drying	0.3%	0.11%
Residue on ignition	0.10%	0.05%

Parameters of L-Tryptophan CAS 73-22-3

Product parameters
Cas number:	73-22-3
Appearance:	White crystals or crystalline powder
Purity:	98.5%~101.5%
Package details:	25kg/drum
Brand:	Fortunachem

L-Tryptophan is an essential amino acid — meaning the human body cannot synthesize it on its own and must obtain it through diet or supplementation. It serves as a precursor to several important biochemical compounds in the body, most notably serotonin and melatonin, which play key roles in mood regulation, sleep, and cognitive function.

Key Roles and Uses of L-Tryptophan

Serotonin Production

L-Tryptophan is converted into 5-hydroxytryptophan (5-HTP), which is then used to produce serotonin, a neurotransmitter that helps regulate:

Mood

Appetite

Anxiety

Depression

Melatonin Synthesis

Serotonin is further converted into melatonin, a hormone critical for regulating the sleep-wake cycle (circadian rhythm).

This makes L-tryptophan potentially useful for improving sleep quality and managing insomnia.

Mood and Mental Health Support

Due to its role in serotonin production, L-tryptophan has been studied for its potential to help with:

Mild to moderate depression

Seasonal affective disorder (SAD)

Premenstrual dysphoric disorder (PMDD)

Appetite Regulation

Serotonin influences satiety signals, so L-tryptophan may help reduce carbohydrate cravings and support healthy eating behaviors.

Cognitive Function

Adequate serotonin levels are linked to better focus, memory, and emotional resilience.

Dietary Sources

L-Tryptophan is found in many protein-rich foods, including:

Turkey and chicken

Eggs

Cheese (especially cottage cheese)

Nuts and seeds (e.g., pumpkin seeds, almonds)

Soy products (tofu, soy milk)

Fish (salmon, tuna)

Oats and bananas (in smaller amounts)

Supplementation Considerations

Typical supplemental doses range from 500 mg to 1,000 mg per day, often taken before bed to support sleep.

Caution: L-Tryptophan should not be combined with antidepressants (especially SSRIs, MAOIs, or SNRIs) without medical supervision due to the risk of serotonin syndrome — a potentially dangerous condition caused by excessive serotonin.

In the late 1980s, a contaminated batch of L-tryptophan supplements was linked to a rare condition called eosinophilia-myalgia syndrome (EMS), leading to temporary bans. Modern, high-quality supplements from reputable sources are considered safe.

Summary

L-Tryptophan is a vital amino acid with significant roles in brain health, mood balance, and sleep regulation. While it’s available in food, targeted supplementation may offer benefits for sleep disorders, mild depression, or stress-related symptoms—when used responsibly and under guidance.

Let me know if you’d like dosage guidelines, comparisons with 5-HTP, or information on clinical studies!