This is a practitioner-only product. We will contact you when you order this product prior to processing your purchase order.
During our complimentary phone consultation with you, we will discuss:

  • Your needs in order to determine whether this product is suitable for you; and/or

  • Whether you have script or referral documentation prescribing this product from a qualified health professional.




  • L-PHENYLALANINE (500MG)- Douglas Laboratories

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    • Regular price $40.54
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    L-PHENYLALANINE (500MG) in New Zealand 

    Phenylalanine is an essential amino acid that must be obtained through the diet. Found primarily in high protein sources such as meat and eggs, it plays an important role in regulating the nervous system. LPhenylalanine can be used to metabolize two distinct chemicals, phenylethylamine and tyrosine. Phenylethylamine is a neuroamine which may have regulating effects in mood and feelings of well-being. Tyrosine is an important amino acid used to produce certain neurotransmitters, including dopamine, epinephrine (adrenaline) and norepinephrine (noradrenaline). The synthesis of these neurotransmitters is limited by the rate of tyrosine entry from plasma into the brain. L-tyrosine is a conditionally essential amino acid that can be manufactured by the body from the essential amino acid phenylalanine. Therefore, adequate tyrosine production depends on a sufficient supply of phenylalanine in the diet.

    Pack: 90 Capsules