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Manufacturer Source Naturals
Supply 20
Form Capsule
Potency 500 mg
Size 60


Regular price $17.98 $0.00 Unit price per
Shipping calculated at checkout.

L-tryptophan is an essential amino acid and a precursor for the synthesis of both melatonin and serotonin, a hormone and a neurotransmitter involved with mood and stress response as well as sleep/wake cycles. If needed L-tryptophan converts to niacin in the body, an important B vitamin. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.


1 capsule three times daily, between meals and preferable with fruit juice. To support restful sleep, take 3 capsules before bed.


3 capsules contain: Iron (naturally occuring 600 mcg- 3% DV) L-Tryptophan 1.5G (25mg niacin equivalents). Other ingredients: gelatin (capsule, microcrystalline cellulose, silica, and magnesium stearate and dibasic calcium phosphate.