Other ingredients
Cellulose; Stearate; Microcrystalline Cellulose
Image: NIH Office of Dietary Supplements, Dietary Supplement Label Database — No separate image reuse license stated
Life Extension
D L-Phenylalanine 500 mg
Capsule
Serving size1 Vegetarian Capsule(s)
Servings per containerNot listed
Package100 Vegetarian Capsule(s)
Data retrievedJul 28, 2026
Supplement Facts
Serving size 1 Vegetarian Capsule(s)
DL-Phenylalanine500 mgDV not established
Label directions
Directions: Take one (1) capsule daily on an empty stomach in the morning; or as recommended by a healthcare practitioner. Best utilized if taken with the co-factors vitamins B6 and C.
Label warnings
Read the entire label and follow the directions carefully prior to use. Caution: May cause anxiety high blood pressure and headache. Do not use if you have phenylketonuria. Do not use phenylalanine or tyrosine if you have cancer or muscular dystrophy. Because phenylalanine can elevate blood pressure in hypertensives consult your healthcare practitioner if you have hypertension. Insomnia may occur from overstimulation if taken too close to bedtime. 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.
Identity and label version
NIH label record328411
Entered into NIH DSLDApr 24, 2025
UPC / GTIN00737870167112
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 328411Entered Apr 24, 2025
Serving size1 Vegetarian Capsule(s)
Formula version040e3fef
Ingredients on label1
NIH sourceOpen label ↗
DL-Phenylalanine500 mg
Label warning: Read the entire label and follow the directions carefully prior to use. Caution: May cause anxiety high blood pressure and headache. Do not use if you have phenylketonuria. Do not use phenylalanine or tyrosine if you have cancer or muscular dystrophy. Because phenylalanine can elevate blood pressure in hypertensives consult your healthcare practitioner if you have hypertension. Insomnia may occur from overstimulation if taken too close to bedtime. 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.
Earlier labelNIH record 232162Entered Aug 23, 2020
Serving size1 Vegetarian Capsule(s)
Formula version5a8fca9a
Ingredients on label1
NIH sourceOpen label ↗
DL-Phenylalanine500 mg
Label warning: Caution: May cause anxiety high blood pressure and headache. Do not use if you have phenylketonuria. Do not use phenylalanine or tyrosine if you have cancer or muscular dystrophy. Because phenylalanine can elevate blood pressure in hypertensives consult your healthcare practitioner if you have hypertension. Insomnia may occur from overstimulation if taken too close to bedtime. 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.