Other ingredients
Cellulose; Microcrystalline Cellulose; Carboxymethyl Cellulose; Stearic Acid (C18:0)
Image: NIH Office of Dietary Supplements, Dietary Supplement Label Database — No separate image reuse license stated
Life Extension
L-Tryptophan 500 mg
Capsule
Serving size1 Vegetarian Capsule(s)
Servings per containerNot listed
Package90 Vegetarian Capsule(s)
Data retrievedJul 28, 2026
Supplement Facts
Serving size 1 Vegetarian Capsule(s)
L-Tryptophan500 mgDV not established
Label directions
Directions: Take one (1) capsule 2 to 3 times daily on an empty stomach; or as recommended by a healthcare practitioner. Best if taken separately from protein or amino acids.
Label warnings
Read the entire label and follow the directions carefully. Best if taken separately from protein or amino acids. Caution: Consult your healthcare provider before using this product if you are taking medication for mood concerns such as MAOIs or SSRIs. Use caution before driving or operating heavy machinery. Warnings: Keep out of reach of children. Do not exceed recommended dose. Do not purchase if outer seal is damaged. Consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating. To report a serious adverse event or obtain product information contact 1-866-280-2852.
Identity and label version
NIH label record328524
Entered into NIH DSLDApr 24, 2025
UPC / GTIN00737870172291
Manufacturer / distributor on labelQuality Supplements and Vitamins Inc.
Market statusOn market in the source data
“Entered into NIH DSLD” is the database entry date for this label record. It is not a manufacturer launch date or a label effective date.
NIH label history (2)
Current labelNIH record 328524Entered Apr 24, 2025
Serving size1 Vegetarian Capsule(s)
Formula version5b326eaa
Ingredients on label1
NIH sourceOpen label ↗
L-Tryptophan500 mg
Label warning: Read the entire label and follow the directions carefully. Best if taken separately from protein or amino acids. Caution: Consult your healthcare provider before using this product if you are taking medication for mood concerns such as MAOIs or SSRIs. Use caution before driving or operating heavy machinery. Warnings: Keep out of reach of children. Do not exceed recommended dose. Do not purchase if outer seal is damaged. Consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating. To report a serious adverse event or obtain product information contact 1-866-280-2852.
Earlier labelNIH record 231998Entered Aug 23, 2020
Serving size1 Vegetarian Capsule(s)
Formula versioneff62019
Ingredients on label1
NIH sourceOpen label ↗
L-Tryptophan500 mg
Label warning: Caution: Consult your healthcare provider before taking this product if you are taking prescription medications (e.g. MAOI and SSRI antidepressants) for depression. Concomitant use of L-tryptophan with antidepressant medications has the potential to increase the risk of serotonin syndrome characterized by symptoms like confusion sweating agitation nausea involuntarymuscle contractions and racing heartbeat. Do not use L-tryptophan before driving or operating heavy machinery Warnings:Keep out of reach of children. Do not exceed recommended dose.Do not purchase if outer seal is broken or damaged. When using nutritional supplements please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating. To report a serious adverse event or obtain product information contact 1-866-280-2852.
Sources and traceability
- NIH Dietary Supplement Label DatabaseData retrieved Jul 28, 2026Open source ↗
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Data comes from product labels or official public sources. It does not mean Safmira, NIH, or FDA approves, certifies, or recommends this product. Label amounts are not laboratory measurements.