Essential amino acids cannot be produced in the body, so they need to be obtained from the diet.

Methionine is one of the essential amino acids that cannot be synthesized in the human body.

He found out that there was a foreign object inside his body.

He ate one apple.

Water is indispensable for human life.

His cooperation is indispensable for this project.

Amino acids are very important nutrients for our body.

This chemical reaction occurs by the synthesis of two elements.

He is conducting an experiment to synthesize a new compound.

Humans can make mistakes.