L-Lysine is an essential amino acid. This means that the body cannot manufacture it and therefore it has to be introduced either through the diet or in the form of a supplement. Amino acids are the 'building blocks' of proteins and L-Lysine is a major part of carnitine which is responsible for the breakdown of fatty acids to produce energy. L-Lysine also has a role in the formation of collagen which is used by the bones and connective tissues in the body. It is also thought to help the body absorb calcium which is vital for good bone health.

Protein sources such a meat, fish and eggs are good places to find L-Lysine naturally. Brewers yeast and nuts also offer valuable sources of this amino acid. It is also possible to buy L-Lysine in a supplement form if required.

Why take L-Lysine?

It is thought that L-Lysine can help with the following conditions:

  • Herpes Simplex Virus - cold sores and genital herpes.
  • Recovery from injury or following surgery.
  • Imrpoves fat mobilisation which can help with weight loss and/or muscle gain.
  • Osteoporosis - this has not been confirmed by any human studies but it is thought that the ability of this supplement to help the body absorb calcium is significant in the treatment and prevention of osteoporosis.

What are the side effects of L-Lysine?

In normal doses L-Lysine is not thought to have any significant side effects. However, high doses and/or long term use could result in the following problems:L-Lysine

  • Rise in cholesterol levels
  • Stomach pains
  • Problems with protein metabolism

This supplement should not be taken with:

  • Antibiotics
  • Dairy products

If you are currently taking any prescribed medication or have any medical conditions please consult your doctor or consultant, to seek advice before taking any vitamins or supplements.