Amino Acid	Function	Animal Sources	Plant Sources
Histidine	Essential for growth, tissue repair, and production of histamine.	Meat, fish, poultry, dairy	Soy products, quinoa, sesame seeds
Isoleucine	Supports muscle repair, energy regulation, and immune function.	Eggs, fish, poultry	Lentils, almonds, chia seeds
Leucine	Promotes muscle repair and growth, aids in energy production.	Beef, pork, chicken, eggs	Peanuts, soybeans, lentils
Lysine	Aids in calcium absorption, collagen production, and immune function.	Dairy, eggs, fish	Black beans, quinoa, pumpkin seeds
Methionine	Vital for metabolism, detoxification, and as a precursor for cysteine.	Eggs, fish, chicken	Brazil nuts, sunflower seeds, legumes
Phenylalanine	Precursor for neurotransmitters like dopamine and norepinephrine.	Beef, pork, dairy	Soy products, almonds, chickpeas
Threonine	Supports immune function, collagen production, and fat metabolism.	Cottage cheese, fish, poultry	Tofu, lentils, sunflower seeds
Tryptophan	Precursor to serotonin and melatonin; supports mood and sleep regulation.	Turkey, chicken, eggs	Oats, bananas, sesame seeds
Valine	Promotes muscle recovery, energy, and tissue repair.	Eggs, meat, fish	Whole grains, soy, peanuts

The List of Known Amino Acids

Comprehensive Amino Acids Table

Amino Acid	Function	Animal Sources	Plant Sources
Histidine*	Essential for growth, tissue repair, and production of histamine.	Meat, fish, poultry, dairy	Soy products, quinoa, sesame seeds
Isoleucine*	Supports muscle repair, energy regulation, and immune function.	Eggs, fish, poultry	Lentils, almonds, chia seeds
Leucine*	Promotes muscle repair and growth, aids in energy production.	Beef, pork, chicken, eggs	Peanuts, soybeans, lentils
Lysine*	Aids in calcium absorption, collagen production, and immune function.	Dairy, eggs, fish	Black beans, quinoa, pumpkin seeds
Methionine*	Vital for metabolism, detoxification, and as a precursor for cysteine.	Eggs, fish, chicken	Brazil nuts, sunflower seeds, legumes
Phenylalanine*	Precursor for neurotransmitters like dopamine and norepinephrine.	Beef, pork, dairy	Soy products, almonds, chickpeas
Threonine*	Supports immune function, collagen production, and fat metabolism.	Cottage cheese, fish, poultry	Tofu, lentils, sunflower seeds
Tryptophan*	Precursor to serotonin and melatonin; supports mood and sleep regulation.	Turkey, chicken, eggs	Oats, bananas, sesame seeds
Valine*	Promotes muscle recovery, energy, and tissue repair.	Eggs, meat, fish	Whole grains, soy, peanuts
Alanine	Helps convert glucose into energy and supports muscle integrity.	Meat, poultry, fish	Whole grains, soy, vegetables
Aspartic Acid	Involved in hormone production and urea cycle.	Meat, eggs, fish	Oats, avocado, asparagus

Footnotes:

• * Essential amino acids must be obtained from the diet.
• ** Conditionally essential amino acids may become essential under certain conditions, such as stress or illness.