Multiple choice

Which of the following cannot be synthesized naturally in the human body?

  1. Essential amino acids

  2. Vitamin K

  3. Fatty acids

  4. Insulin
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A Correct answer
Explanation

An essential amino acid or indispensable amino acid is an amino acid that cannot be synthesized de novo by the organism (usually referring to humans) and therefore, must be supplied in the diet. The amino acids regarded as essential for humans are phenylalanine, valine, threonine, tryptophan, isoleucine, methionine, leucine, lysine and histidine.

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