Foods high in Cystine
Every food and ingredient below is ranked by measured Cystine content per 100 g, drawn live from 27 USDA FoodData Central measurements. Values are laboratory-analysed or survey-derived, not estimated.
Top 21 foods highest in Cystine
Ranked by Cystine per 100g, across Foundation Foods and FNDDS ingredients.
Lowest in Cystine
For contrast — the 6 lowest non-zero values on record, per 100g.
| # | Food or ingredient | Source | Per 100g (G) |
|---|---|---|---|
| 22 | Melons, cantaloupe, raw | Foundation Food | 0.002 |
| 23 | Lettuce, cos or romaine, raw | Foundation Food | 0.006 |
| 24 | Broccoli, raw | Foundation Food | 0.028 |
| 25 | Figs, dried, uncooked | Foundation Food | 0.033 |
| 26 | Restaurant, Chinese, sweet and sour pork | Foundation Food | 0.11 |
| 27 | Cheese, dry white, queso seco | Foundation Food | 0.15 |
More on Cystine
What Cystine is, how it is measured, and where these values come from.
Cystine nutrient reference →Sourced from USDA FoodData Central — Foundation Foods; not yet through an editorial verification pass.
USDA release 2026-04-30. All values are per 100 g unless stated otherwise.