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Macronutrients – Proteins

Essential Amino Acid

Amino acids your body cannot produce and must consume through food.

Definition

An amino acid that the human body cannot synthesize and must be obtained through diet. There are 9 essential amino acids required for optimal health.

How it works

Essential amino acids are building blocks of proteins that your body needs but cannot manufacture on its own. Unlike non-essential amino acids, your body relies entirely on dietary sources to obtain them. These 9 amino acids play crucial roles in muscle building, immune function, and neurotransmitter synthesis. Without adequate intake of all essential amino acids, your body cannot perform vital functions efficiently. They are called 'essential' precisely because obtaining them is essential to survival.

Role

Builds and repairs muscle tissue, synthesizes enzymes and hormones, and supports immune function.

Examples

  • Leucine
  • Isoleucine
  • Valine
  • Lysine
  • Methionine
  • Tryptophan
  • Threonine
  • Phenylalanine
  • Histidine

Recommendations

Ensure you consume all 9 essential amino acids daily by including complete protein sources or combining complementary plant proteins. Distribute protein intake throughout the day for optimal muscle protein synthesis.

Key takeaway

Essential amino acids must come from your diet because your body cannot make them.

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