EXPLORE A NUTRIENT
Tryptophan
Discover how amounts vary across foods, on a shared basis for comparison.
Understand this nutrient ↓What is it?
An individually reported amino acid. The reference depicts L-tryptophan. [1] [2]
This reference form does not represent every form included in the USDA quantity.
Description, source and attribution
Reference depiction: L-tryptophan. Formula C11H12N2O2; PubChem CID 6305; charge 0. This specified form does not represent every form or molecule included in the USDA quantity.
PubChem Compound 6305, 2D Structure. NCBI / National Library of Medicine. Source · Reuse terms
Source check:
A COMMON BASIS
Foods, per 100 g
147 foods with data 59 not reported, excluded from ranking
- Orange
Raw orange, all commercial varieties; edible flesh.
0.009 g - Peach
Yellow peach, raw.
0.009 g - Plum
Plums, raw, exactly as identified by USDA.
0.009 g - Radish
Radishes, raw, exactly as identified by USDA.
0.009 g - Chayote
Chayote fruit, boiled, drained, without salt.
0.008 g - Eggplant
Eggplant, boiled, drained, without salt.
0.008 g - Pink and red grapefruit
Raw pink and red grapefruit, all areas.
0.008 g - Papaya
Raw papaya, edible portion.
0.008 g - Starfruit
Carambola, (starfruit), raw, exactly as identified by USDA.
0.008 g - Taro
Taro, cooked, without salt, exactly as identified by USDA.
0.008 g - Dates
Dates, medjool, exactly as identified by USDA.
0.007 g - Lychee
Litchis, raw, exactly as identified by USDA.
0.007 g
All results are sorted before pagination. Bars compare amounts within this search; they do not indicate health benefits. Not reported does not mean zero.
UNDERSTAND THE DATA
What it means for your diet
This source explains dietary protein and amino acids as a group. The specific USDA identity above remains separate; protein advice is not an intake target or supplement recommendation for an individual amino acid.
Ranking amounts describe foods, not supplement doses. A high rank does not mean you should consume more. Source recommendations and cautions retain their original population and scope.
Dietary Proteins [1]
Source: MedlinePlus, National Library of Medicine. Original health-topic summary, reproduced with attribution.
Protein is in every cell in the body. Our bodies need protein from the foods we eat to build and maintain bones, muscles and skin. We get proteins in our diet from meat, dairy products, nuts, and certain grains and beans. Proteins from meat and other animal products are complete proteins. This means they supply all of the amino acids the body can't make on its own. Most plant proteins are incomplete. You should eat different types of plant proteins every day to get all of the amino acids your body needs.
It is important to get enough dietary protein. You need to eat protein every day, because your body doesn't store it the way it stores fats or carbohydrates. How much you need depends on your age, sex, health, and level of physical activity. Most Americans eat enough protein in their diet.
Explanation bibliography
- . MedlinePlus, National Library of Medicine. Last updated July 17, 2024. Accessed: 2026-09-16. .
Identity and structure sources
- PubChem Compound 6305: L-Tryptophan · Accessed 2026-09-13
- USDA FoodData Central: Foundation Foods Documentation · Accessed 2026-09-13