Definition:
Tryptophan is an essential amino acid, meaning it must be found in the diet. Tryptophan is a precursor of the neurotransmitter serotonin, melatonin, a hormone related to sleep, and the B vitamin niacin, although additional niacin must come from food. Tryptophan is also necessary for normal growth and development of infants. It is found in turkey, chicken, milk, cheese, fish, eggs, tofu, soy, sesame and pumpkin seeds, nuts, peanuts, and peanut butter (About Nutrition).
Tryptophan is an essential amino acid, meaning it must be found in the diet. Tryptophan is a precursor of the neurotransmitter serotonin, melatonin, a hormone related to sleep, and the B vitamin niacin, although additional niacin must come from food. Tryptophan is also necessary for normal growth and development of infants. It is found in turkey, chicken, milk, cheese, fish, eggs, tofu, soy, sesame and pumpkin seeds, nuts, peanuts, and peanut butter (About Nutrition).
Pronunciation:
Tryptophan: TRIP-tuh-fan
Tryptophane: TRIP-tuh-fain
Tryptophan: TRIP-tuh-fan
Tryptophane: TRIP-tuh-fain
Alternate Spellings: tryptophane
