Amino Acid Complex That Repairs Muscles

This page is the CodyCross answer for the clue below from Street Fair, Group 1304, Puzzle 4 (Interactive Learning).

Question is: Amino Acid Complex That Repairs Muscles

and the answer is: PROTEIN

Word Meaning:

PROTEIN — (biochemistry, countable) Any of numerous large, complex naturally-produced molecules composed of one or more long chains of amino acids, in which the amino acid groups are held together by peptide bonds.

Definitions from Wiktionary.

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