Lamberts L-Phenylalanine 500mg 60 Capsules


Lamberts L-Phenylalanine 500mg 60 Capsules

Availability: Out of stock


More Information

Lamberts L-Phenylalanine 500mg 60 Capsules are the natural L-Phenylalanine and is presented in its free-form to ensure optimal absorption. Each capsule provides a full 500mg of L-Phenylalanine and is made in the UK to pharmaceutical GMP standards. 

  • 60 capsules.
  • Each capsule provides a full 500mg of L-Phenylalanine.
  • Made in the UK to pharmaceutical GMP standards.
  • Presented in its free-form to help ensure optimal absorption.
  • Aids the effects of vitiligo and depression.

L-Phenylalanine is commonly used for vitiligo (skin disease) and depression. The body changes phenylalanine into tyrosine, another amino acid that's needed to make proteins and brain chemicals, including norepinephrine. Because norepinephrine affects mood, different forms of phenylalanine have been proposed to treat depression. 

Preliminary studies indicate that L-phenylalanine strengthens the effect of UVA radiation for people with vitiligo. Vitiligo is a condition where irregular depigmentation (loss of color) causes white patches of skin. L-phenylalanine may lead to some darkening or repigmentation of the white patches, particularly on the face.


More Information

Please Note: People with a condition known as phenylketonuria (PKU), in which phenylalanine cannot be broken down, should not take any form of phenylalanine supplements. Nor should phenylalanine supplements be taken in conjunction with prescription anti-depressants, particularly monoamine oxidase (MAO) inhibitors. 

PKU is a rare metabolic disorder that occurs in people who are missing an enzyme that the body requires to use phenylalanine. This causes high levels of phenylalanine to build up and if not treated before 3 weeks of age, can cause severe, irreversible intellectual disability. Individuals with PKU must consume a diet that avoids phenylalanine and take tyrosine supplements to have optimum brain development and growth.

Phenylalanine is found naturally in the breast milk of mammals. It is used in nutritional supplements for its reputed analgesic and antidepressant effects. L-phenylalanine is an essential amino acid and is the only form of phenylalanine found in proteins. Major dietary sources of L-phenylalanine include beef, poultry, pork, fish, milk, yogurt, eggs, cheese, soy products (including soy protein isolate, soybean flour, and tofu), and certain nuts and seeds. 

Directions of use


Take 1 Lamberts L-Phenylalanine Capsule daily with water or fruit juice, or as directed by a practitioner or pharmacist. An amino acid is best taken half an hour before any meal or at bedtime.

Disintegration Time: Less than 30 minutes.


  • Not to be taken by PKU sufferers.
  • Not to be used with MAO inhibitors.
  • Do not take if pregnant or breast feeding.
  • Do not exceed the recommended daily dose.
  • Keep away from children.
  • Food supplements should not be a substitute for a varied diet.
  • To be taken on the advice of a practitioner or pharmacist only.

More Information

A cream powder in a clear hard shell capsule.
Each capsule delivers:
L-Phenylalanine 500mg 

Encapsulated with:
Capsule Shell (Gelatin), Cellulose, Magnesium Stearate, Silicon Dioxide. 


Orders under £50:

Royal Mail £3.99 delivery within 1-3 working days from dispatch.


Orders over £50:

Free Delivery within 1-3 working days from dispatch.


UK delivery charges are charged at a flat rate. This means regardless of what you order, they will not increase. Standard UK £3.99 delivery is sent using the Royal Mail TRACKED 48HR service and your order will be delivered within 2-3 days. Free UK delivery is sent either by Royal Mail TRACKED 48HR or via a Courier. For international deliveries please check our delivery page .

Please wait...

{{var product.name}} was added to your basket.

{{var product.name}} was removed from your basket.