Essential Amino Acids
Also known as: EAAs, Indispensable Amino Acids
The nine amino acids that cannot be made by the body and must be obtained through diet.
FULL EXPLANATION
Essential amino acids (EAAs) are the nine amino acids that the human body cannot synthesize and must be obtained from food: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
These amino acids are critical for protein synthesis, enzyme function, hormone production, and numerous other biological processes. Complete proteins (like meat, eggs, and dairy) contain all nine EAAs in adequate amounts.
WHY IT MATTERS
Adequate EAA intake is necessary for muscle building, immune function, and overall health. Deficiency in any single EAA can limit protein synthesis.
HOW TO IMPROVE
Ensure adequate EAA intake through complete protein sources or combining complementary plant proteins. Consider EAA supplements around training if needed.
NORMAL RANGES
Daily EAA requirements vary by body weight and activity. The leucine threshold (2.5-3g per meal) is often used as a practical target to maximize muscle protein synthesis.
RELATED TERMS
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The three main nutrients that provide energy: carbohydrates, proteins, and fats.
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