1. Essential amino acid: All amino acids that cannot be synthesized in the body are called essential amino acids. For example, leucine, isoleucine, lysine, tryptophan, phenylalanine, threonine, valine, methionine etc. 10 essential amino acids for children.
2. Non-essential amino acid: All the amino acids that are synthesized in the body are called non-essential amino acids. 12 non-essential amino acids.