D,L-Phenylalanine - Life Extension - 100 Capsules (500 mg) - TwinPak

D,L-Phenylalanine - Life Extension - 100 Capsules (500 mg) - TwinPak
Item# LEF-01671x2
Retail Price: $37.50
Your Price: $28.50
Select: 

D,L-Phenylalanine Capsules, 500 mg 100 vegetarian capsules, Item# 01671 - 2 Bottle TwinPak

D,L-Phenylalanine Capsules are a 50/50 blend of the D-and L-forms of phenylalanine. D-phenylalanine is used to relieve pain. L-phenylalanine is used as an appetite suppressant, stimulant and antidepressant.

Phenylalanine is used by the brain to produce norepinephrine, a hormone depleted by stress, overwork and certain drugs. One to two capsules are usually taken upon awakening, on an empty stomach. Phenylalanine should be used with caution by people with hypertension, as it may raise blood pressure in some individuals.

If you have hypertension, you may wish to monitor your blood pressure with a home blood pressure monitor kit when starting out with small doses of phenylalanine. Phenylalanine should also be avoided by cancer patients.

Supplement Facts

Serving size: 1 capsule

Amount per capsule % Daily value
  • D,L-phenylalanine 500 mg*


* Daily Value not established.

Other ingredients: vegetable cellulose (capsule), microcrystalline cellulose, vegetable stearate.

Dosage and Use: Take one 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.

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.


1-888-771-3905 | Free Shipping in the Continental U.S. on Orders over $50
The statements made here have not been evaluated by the FDA. The foregoing statements are based upon sound and reliable studies, and are meant for informational purposes. Consult with your medical practitioner to determine the underlying cause of your symptoms. Please always check your purchase for possible allergins and correct dosage on the bottle before use.

While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Life Extension Institute assumes no liability for inaccuracies or misstatements about products.