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L- Phenylalanine 500mg

Supports A Positive Mood

Now Foods L-Phenylalanine.  This free form amino acid can serves as a building block in the body for the production of various proteins. This amino acid can be converted to L-tyrosine and subsequently to L-dopa, norepinephrine & epinephrine. nervous system support. Supports a positive mood. Free-Form. 500mg. 120 Veg capsules

120 Vegetarian Capsules Print this page




120 Vegetarian Capsules

Common Uses

L- phenylalanine has been used for helping with agitation, alcohol withdrawal, appetite control, chronic pain, depression, kidney failure, memory loss, obesity, opiate withdrawal and a poor libido.

Suggested Dosage

One to three capsules daily or as directed by your health care professional. For absorption, avoid taking within 45 minutes of having food or between a meal.

Health Information

L-Phenylalanine - Nervous system support

Phenylalanine (LPA) is an essential amino acid that cannot be synthesised in the body and must be derived from the diet. For complete utilisation of dietary protein in the synthesis of tissue proteins and growth, daily intake should be 2.8 grams per 100 grams of dietary protein.

L-Phenylalanine and Tyrosine Production

Phenylalanine is the major precursor of the amino acid tyrosine. This, in turn, is the precursor of many important chemicals in the body, including the neurotransmitters adrenaline and noradrenaline, the thyroid hormone thyroxin and the pigment melanin. It has also been used in preparations marketed as smart drugs. The basis for this use is probably the elevation of neurotransmitters in the brain. LPA can also be converted (through a separate pathway) to phenylethylamine, a substance that occurs naturally in the brain and appears to elevate mood.

D - phenylalanine (DPA) is not normally found in the body and cannot be converted to L-tyrosine, L-dopa, or norepinephrine. As a result, DPA is converted primarily to phenylethylamine (the potential mood elevator). DPA also appears to influence certain chemicals in the brain that relate to pain sensation.

DLPA is a mixture of LPA and its mirror image DPA. DLPA (or the D- or L - form alone) has been used to treat depression. DPA may be helpful for some people with Parkinson's disease and has been used to treat chronic pain-including pain from osteoarthritis and rheumatoid arthritis-with both positive and negative results. No research has evaluated the effectiveness of DLPA on rheumatoid arthritis.  Here is a link to DLPA, if you are looking for this instead.


Each 1 Veg capsule contains: L-Phenylalanine (Free-Form) 500mg.  Other ingredients:cellulose (capsule vegetable source).  Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.


Keep out of reach of Children. For adult use only.  L Phenylalanine should NOT be used during pregnancy or breastfeeding, or by people with phenylketonuria (PKU). People with high blood pressure should only take L Phenylalanine after meals, and only after seeking advice from their health care professional.

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All supplement orders over NZ$50 are delivered freight free NZ wide right to your door.
Food items and cleaning products may be excluded from freight free - we will contact you if additional delivery charges apply in these instances. A charge of $3.50 will apply to all rural delivery.


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