Harvard Health Letter

Isoflavone content of selected foods

Food

Total isoflavones (milligrams per 100 grams)

Bacon bits, meatless

118.50

Cereal, Kashi Go-Lean

17.4

Chicken nuggets, meatless, Worthington FriChik

12.2

Cinnamon roll, McDonald's

6

Doughnuts, cake-type, plain

5.31

Egg

0.05

Infant formula, Enfamil Next Step, soy formula, not reconstituted

25

Miso soup

1.52

Natto

82.29

Ramen noodle soup, beef flavor

1.23

Pistachios

3.63

Red clover

21

Snack bar, Cliff Bar, Crunchy Peanut Butter Flavor

26.9

Soybeans, green, raw (includes edamame)

48.95

Soy cheese, American

17.95

Soy cheese, cheddar

6.87

Soy chips

54.16

Soy protein drink

81.65

Soy sauce made from hydrolyzed vegetable protein

0.10

Soy sauce made from soy and wheat (shoyu)

1.18

Soy yogurt

33.17

Taco, Jack in the Box Beef Monster

15.9

Tofu, firm, cooked

22.05

Tofu, fried

34.78

Veggie burger

6.39

Source: United States Department of Agriculture, Nutrient Data Laboratory

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