The below doses are based on scientific research, publications, traditional use, or expert opinion. Many herbs and supplements have not been thoroughly tested, and safety and effectiveness may not be proven. Brands may be made differently, with variable ingredients, even within the same brand. The below doses may not apply to all products. You should read product labels, and discuss doses with a qualified healthcare provider before starting therapy.
Adults (over 18 years old)
Soy is typically consumed as a protein drink, soy flour, isolated soy protein (e.g. Supro®), extract, fiber/cereal, or milk beverage. Studies have examined the effects of 10-106 grams of soy with an isoflavone content of about 40-120 milligrams taken daily for up to 12 months by mouth.
A dose of 20-106 grams of soy protein taken daily by mouth has been studied in people with high cholesterol. Isoflavone content has ranged from 60 to over 100 milligrams daily. Cholesterol and low-density lipoprotein levels have been reduced in people using these doses of soy protein. There is limited study of soymilk (400 milliliters daily) in pre-menopausal women, with reported benefits on cholesterol levels. Additional doses have been studied but are not recommended due to a lack of available scientific evidence.
Children (under 18 years old)
Due to potential safety concerns, a qualified healthcare provider should be consulted regarding the choice of infant formula.