Question

Why are certain amino acids called essential amino acids?

Answer 1

The human body uses amino acids to produce proteins, perform critical metabolic functions in the formation of other molecules and to produce energy. Some amino acids are synthesized by the human body, but theessential amino acids must be obtained from food.

Answer 2

Amino acids are one of the most important nutrients for our body,we need various amino acids for a healthy lifestyle.

But most of those amino acids are not synthesized in our body,they are obtained from the eaten food materials.

That's why they are known as the essential amino acids.

For example:

Leucine,IsoLeucine, Lysine, histidine etc.