Foods high in Isoleucine
Every food and ingredient below is ranked by measured Isoleucine content per 100 g, drawn live from 71 USDA FoodData Central measurements. Values are laboratory-analysed or survey-derived, not estimated.
Top 25 foods highest in Isoleucine
Ranked by Isoleucine per 100g, across Foundation Foods and FNDDS ingredients.
| # | Food or ingredient | Source | Per 100g (G) |
|---|---|---|---|
| 1 | Flour, soy, defatted | Foundation Food | 2.31 |
| 2 | Flour, soy, full-fat | Foundation Food | 1.74 |
| 3 | Mushroom, maitake | Foundation Food | 1.57 |
| 4 | Mushroom, pioppini | Foundation Food | 1.25 |
| 5 | Mushroom, crimini | Foundation Food | 1.24 |
| 6 | Cheese, dry white, queso seco | Foundation Food | 1.16 |
| 7 | Mushrooms, white button | Foundation Food | 1.15 |
| 8 | Mushroom, portabella | Foundation Food | 1.01 |
| 9 | Flaxseed, ground | Foundation Food | 0.938 |
| 10 | Almond butter, creamy | Foundation Food | 0.93 |
| 11 | Mushroom, oyster | Foundation Food | 0.923 |
| 12 | Peanut butter, creamy | Foundation Food | 0.92 |
| 13 | Sesame butter, creamy | Foundation Food | 0.859 |
| 14 | Mushrooms, shiitake | Foundation Food | 0.786 |
| 15 | Nuts, almonds, whole, raw | Foundation Food | 0.774 |
| 16 | Eggs, Grade A, Large, egg yolk | Foundation Food | 0.766 |
| 17 | Mushroom, king oyster | Foundation Food | 0.758 |
| 18 | Mushroom, lion's mane | Foundation Food | 0.748 |
| 19 | Mushroom, beech | Foundation Food | 0.651 |
| 20 | Sausage, turkey, breakfast links, mild, raw | Foundation Food | 0.65 |
| 21 | Mushroom, enoki | Foundation Food | 0.643 |
| 22 | Fish, pollock, raw | Foundation Food | 0.62 |
| 23 | Eggs, Grade A, Large, egg whole | Foundation Food | 0.616 |
| 24 | Eggs, Grade A, Large, egg white | Foundation Food | 0.609 |
| 25 | Nuts, pine nuts, raw | Foundation Food | 0.567 |
Lowest in Isoleucine
For contrast — the 10 lowest non-zero values on record, per 100g.
| # | Food or ingredient | Source | Per 100g (G) |
|---|---|---|---|
| 62 | Nectarines, raw | Foundation Food | 0.008 |
| 63 | Oranges, raw, navels (Includes foods for USDA's Food Distribution Program) | Foundation Food | 0.014 |
| 64 | Oranges, raw, navels | Foundation Food | 0.014 |
| 65 | Pears, raw, bartlett | Foundation Food | 0.014 |
| 66 | Pears, raw, bartlett (Includes foods for USDA's Food Distribution Program) | Foundation Food | 0.014 |
| 67 | Peaches, yellow, raw | Foundation Food | 0.016 |
| 68 | Melons, cantaloupe, raw | Foundation Food | 0.017 |
| 69 | Butter, stick, salted | Foundation Food | 0.022 |
| 70 | Oat milk, unsweetened, plain, refrigerated | Foundation Food | 0.025 |
| 71 | Almond milk, unsweetened, plain, refrigerated | Foundation Food | 0.026 |
More on Isoleucine
What Isoleucine is, how it is measured, and where these values come from.
Isoleucine 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.