Soyfoods contain compounds that inhibit the absorption of minerals (including iron, calcium and zinc) and, because of that, can cause mineral deficiencies or imbalances.
|Soyfoods do not cause mineral deficiencies or imbalances and recent evidence indicates mineral absorption from soy is much better than previously thought.|
For a food to be considered a good source of a nutrient requires not only that it contain ample amounts of that nutrient, but that the nutrient is well absorbed. There are factors in food that both inhibit and enhance nutrient absorption and this is particularly true in the case of minerals. There is perhaps no better example of the importance of absorption than in the case of spinach and calcium. Spinach is especially high in calcium; in fact, one cup of cooked spinach, which is only 41 calories, contains 245 milligrams, almost as much calcium as one cup of cow’s milk. Spinach is also high in iron as one cup provides more than 6 mg (the RDA is 8 and 18 milligrams for men and women aged 19 to 50). However, spinach is not considered a good source of either iron or calcium because the absorption of these minerals is so poor ….