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Amino acid - Wikipedia
Essential Amino Acids: Definition, Benefits, and Food Sources - Healthline
Amino acid | Definition, Structure, & Facts | Britannica
Amino Acids - Benefits, Structure & Function | Biology Dictionary
Amino Acid: Benefits & Food Sources - Cleveland Clinic
Introduction to proteins and amino acids - Khan Academy
Amino Acids: Structure, Classification and Function - ThoughtCo
Essential amino acids: Definition, benefits, and foods - Medical News Today
What Are Amino Acids? - Verywell Fit
Introduction to amino acids (video) | Khan Academy