American Nutrition Email Support American Nutrition Fan American Nutrition on Facebook Follow American Nutrition on Twitter See American Nutrition on Flickr Subscribe to the  American Nutrition Blog Subscribe to the American Nutrition Email Newsletter
soporte telefónico en español lunes a jueves 8-3 MST  View this Site en Espaņol  
McAfee Secure sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams American Nutrition Supplements Logo

Shop American Nutrition


  • PRODUCT SEARCH

American Nutrition Wholesale Products
American Nutrition Affilaiate Log-in
American Nutrition New Products
American Nutrition Health Links
American Nutrition Blog
American Nutrition Articles
Contact American Nutrition
American Nutrition rssFeed American Nutritional Health Supplements Blog twitter flickr American Nutrition Facebook

 

Bookmark and Share

Phenylalanine Supplements

L-Phenylalanine is an essential, nine-carbon amino acid and is a precursor to the amino acid tyrosine. Because tyrosine is necessary for the synthesis of proteins and the production of the neurotransmitters dopamine and norepinephrine, phenylalanine is an extremely important nutrient that must be obtained through the diet or supplementation.

Phenylalanine occurs in two chemical forms: L-phenylalanine, a natural amino acid found in proteins; and its mirror image, D-phenylalanine, a form synthesized in a laboratory. Some research has involved the L-form, others the D-form, and still others a combination of the two known as DL-phenylalanine.

In the body, L-phenylalanine is converted into another amino acid called Tyrosine. Tyrosine in turn is converted into L-dopa, norepinephrine, and epinephrine, three key neurotransmitters (chemicals that transmit signals between nerve cells). Because some antidepressants work by raising levels of norepinephrine, various forms of phenylalanine have been tried as a possible treatment for depression.

D-phenylalanine (but not L-phenylalanine) has been proposed to treat chronic pain. It blocks enkephalinase, an enzyme that may act to increase pain levels in the body.

Best Selling Phenylalanine Supplements

Now Foods L Phenylalanine 500 mg 120 Caps
$14.99 $8.24 Our Price
NF0132 Quantity   
Now Foods L Phenylalanine 500 mg 60 Caps
$7.99 $4.39 Our Price
NF0130 Quantity   
Source Naturals DL Phenylalanine DLPA 120 tabs 375mg
$18.50 $9.43 Our Price
SN0163 Quantity   
Source Naturals DL Phenylalanine DLPA 30 tabs 750mg
$9.50 $4.84 Our Price
SN0164 Quantity   
Source Naturals DL Phenylalanine DLPA 60 tabs 375mg
$9.98 $5.09 Our Price
SN0162 Quantity   
Source Naturals DL Phenylalanine DLPA 60 tabs 750mg
$17.98 $9.16 Our Price
SN0165 Quantity   
Source Naturals L-Phenylalanine 100 tabs 500 mg
$11.98 $6.11 Our Price
SN0161 Quantity   
Source Naturals L-Phenylalanine 3.53 oz powder 100 grams
$28.98 $14.78 Our Price
SN0158 Quantity   
Source Naturals L-Phenylalanine 50 tabs 500 mg
$6.75 $3.44 Our Price
SN0160 Quantity   
Phenylalanine Supplements Pages:
 
Email American Nutrition
  Click to verify BBB accreditation and to see a BBB report. Natural Product Association American Nutrition

Health Articles | Affiliates | Contact | Shipping Policy | Returns Policy | Wholesaler Information | Careers | Sitemap | Testimonials | FAQs | Newsletter

American Nutrition en Espaņol


This information has not been evaluated by the FDA. Notice: The products and information found on americannutrition.com are not intended to replace professional medical advice or treatment. Our dietary supplements are not intended to diagnose, treat, cure or prevent any disease or medical condition. Individual results may vary.

© 1997-2010 American Nutrition Inc., all rights reserved.

The distribution of the information contained on this site is not allowed without prior consent from American Nutrition Inc.