How the amino acids are classified nutritionally?
Nutritionally amino acids are of three types:
1. Essential Amino acids: These are the amino acids, which are not synthesized in the body
tissue but must be taken into diet.
This class of amino acids are leucine, valine, isoleucine, phenyl alanine, threonine, tryptophan, methionine and lysine.
2. Non-Essential Amino acids: These can be synthesized by the body and may not be the
requisite component of diet for example glycine, alanine, serine, aspartic acid.
3. Semi-Essential Amino acids: These are growth promoting factors, they are not synthesized
in sufficient quantity during growth. They include arginine and histidine. They become
essential in growing children, pregnancy and lactating women.
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