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500 mg 60 capsules: Source Naturals, Item# 31247


Retail price

$19.98 each

Save 25%

$14.99 each

500 mg 60 capsules
Item Catalog Number: 31247

The essential amino acid L-tryptophan helps support relaxation, restful sleep, and positive mood. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response and sleep/wake cycles. L-Tryptophan also supports immune functions because it is the body’s precursor to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-Tryptophan is regularly tested to ensure the highest standards of quality.

Supplement Facts

Serving Size 3 capsules

Servings Per Container 20

Amount Per Serving

Iron (naturally occurring)

575 mcg


1.5 g

Other ingredients: gelatin (capsule), dibasic calcium phosphate, microcrystalline cellulose, silica, and magnesium stearate.

Dosage and Use
  • One capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take three capsules before bed.

If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs consult your health care professional before using this product.

Do not use if either tamper resistant seal is broken or missing. Keep out of the reach of children.

Store in a cool, dry place.