Importance of 9 Essential Amino Acids (EAAs) 

By 

M.Sc. Nutrition & Dietetics

Navneet Kaur

Diet

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Our body needs 20 amino acids to grow and function properly. Out of these, 9 amino acids are referred to as Essential Amino Acids (EAAs) as our body can not make them on its own hence we must obtain them through diet or supplement.  

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It is used by the body to make specific hormones and metabolites that affect kidney function, the transmission of nerves, stomach secretions and the immune system.  

1.  Histidine 

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This anabolic amino acid stimulates muscle protein synthesis, prevents muscle breakdown and encourages insulin secretion to support healthy blood sugar levels. 

2.  Leucine 

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It is essential for haemoglobin formation, red blood cells production, and detoxification of nitrogenous waste like ammonia. 

3. Isoleucine 

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Valine is one of three BCAAs that enhance energy, increase endurance, and aid in muscle tissue recovery and repair. 

4. valine

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Tryptophan is an essential factor in mood, behaviour, cognition and maintaining a healthy nitrogen balance in the body. 

5. Tryptophan 

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Phenylalanine act as a precursor to certain vital neurotransmitters like dopamine, norepinephrine, epinephrine and tyrosine. 

6.  Phenylalanine  

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This sulphur-containing amino acid is required for tissue growth and formation, and absorption of some antioxidants. 

7. Methionine   

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This essential amino acid helps suppress anxiety levels by blocking the stress response receptors. Lysine is also believed to strengthen bone health by increasing calcium absorption and retention. 

8. Lysine    

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Threonine aids in creating collagen, elastin, and muscle tissue.  

9. Threonine     

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