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Leucine and Isoleucine – Essential Amino acids that boosts energy levels and stimulates essential hormones.


Leucine is an essential amino acid that boosts energy levels and along with isoleucine and valine plays an important role in energy production in the body. Leucine regulates protein metabolism in the body. The availability of leucine is especially important in controlling the net synthesis of protein. The major sources of leucine are :
– Whole grains
– Milk and milk products
– Eggs
– Pork
– Beef
– Chicken
– Pulses
– Soya Beans
– Leafy vegetables
Therapeutically, leucine as well as isoleucine and valine can be used as a means of minimising protein loss in patients undergoing surgery.

CAUTION : It has been found that dietary excess of leucine may be a precipitating factor in developing pellagra.


Isoleucine is an essential amino acids i.e. it is not formed in the body and hence, must be present in the diet. Along with leucine and valine, it is important in human metabolism as an energy yielding source.
Isoleucine is essential for the production and maintenance of body proteins. It also regulates metabolism and the functioning of the thymus gland in the neck, spleen, and pituitary glands. It is useful in the formation of hemoglobin.
The rich sources of isoleucine are :
– Eggs
– Chicken
– Pork
– Mutton
– Pulses
– Soya Beans
– Cottage cheese
– Milk
– Piyal seeds
– Cashew Nuts
– Cereal grains

Isoleucine is one of a group of amino acids found deficient in persons who are ill. The recommended therapeutic dose of this amino acid is between 240mg and 360mg daily. Hence this must be given in combination with the other amino acids that are found lacking.

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