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500 mg 60 Caps
  • An amino acid supplement for specialized dietary support

  • Provides effective support for healthy mood and other mental function
Get a nutritional boost for mental health with L-Phenylalanine. A precursor of l-tyrosine, this essential amino acid supports the neurotransmitters that help regulate mood and other mental functions.

Twinlab L-Phenylalanine Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

L-Phenylalanine 4 5 1 1
Helps with Mood Twinlab Amino Acids are high quality and Swanson's offers a great price. I feel this particular amino acid contributes to a postive mood. July 30, 2009
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