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Let your food be your medicine, and your medicine be your food. ...Hippocrates
Tryptophan is one of the essential amino acids, the smallest units of protein. Tryptophan is necessary for the synthesis of neurotransmitter serotonin. Dried egg white and soy isolate protein isolates contain the highest tryptophan content (1200 - 1400 milligram/100 gram) of all foods analyzed by USDA Nutrition lab.
Leucine rich food sources include legumes such as soy beans and cowpea and animal products such as beef and fish.
Lysine requirement is different for different age groups, gender and body condition. The Dietary Reference Intakes (DRI), the Estimated Average Requirement (EAR) and Recommended Daily Allowances (RDA), for lysine for healthy individuals are presented in the chart below. The recommendations are according the US Food and Nutrition Board.
The requirements for the essential amino acid threonine varies depending on life stage, gender and age. Here are the EAR and RDA for humans in all age groups.
The US Food and Nutrition Board makes recommendations for the Dietary Reference Intakes (DRI) such as the Estimated Average Requirement (EAR) and Recommended Daily Allowances (RDA) of nutrients for healthy individuals, for North Americans. Here are the EAR and RDA for tryptophan in mg per kg of body per day.
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- Amino Acid Phenylalanine: Food Sources, Health Benefits and Side Effects of Phenylalanine
- Amino Acid Threonine: Food Sources, Health Benefits, Deficiency
- Amino Acid (AA) Symbols and Abbrevations
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