| L-Tryptophan (as 25 mg niacin equivalents) | 1.5 g | † |
Other ingredients: gelatin (capsule), magnesium stearate, silica, microcrystalline cellulose, and dibasic calcium phosphate.
Where this label comes from
Read by Reverse Age Lab on 29 October 2026 from sourcenaturals.com, after the NIH stopped adding labels.
General information
- Product name
- Serene Science® L-Tryptophan
- Brand
- Source Naturals
- Barcode (UPC)
- 0 21078 02542 9
- Net contents
- 120 Capsules
- Market status
- On market
- Label ID
- s873
Classification
- Supplement form
- Capsule
Label statements
Suggested use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take an additional 3 capsules before bed.
Warnings: Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children. CAUTION: 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.
FDA statement: *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Storage: STORE IN A COOL, DRY PLACE.
Other: The essential amino acid L-tryptophan is the precursor for the synthesis of both melatonin and serotonin, a hormone and a neurotransmitter involved with mood and stress response and sleep/wake cycles. It helps support relaxation, restful sleep, and positive mood. If needed, L-tryptophan converts to niacin in the body, an important B vitamin. SERENE SCIENCE® L-TRYPTOPHAN is extremely pure and is regularly tested to ensure the highest standards of quality.*
Brand information
Manufactured for: Source Naturals, Inc., P.O. Box 2116, Santa Cruz, CA 95063
More labels from Source Naturals
Labels only: each label is shown as printed on the bottle, with no grades, rankings or advice. A label in this database is not an endorsement of the product. Read the label on the bottle you buy: makers change their formulas. Reverse Age Lab is not affiliated with, or endorsed by, the National Institutes of Health or its Office of Dietary Supplements. The original labels come from the NIH’s public-domain data; the labels since are read by us. Search the Dietary Supplement Label Database.