Courtesy of Weston A. Price Foundation
Myth: Modern soy foods confer the same health benefits as traditionally fermented
Truth: Most modern soy foods are not fermented to neutralize toxins in soybean and
processed in a way that denatures proteins and increases levels of carcinogens.
Myth: Soy foods provide complete protein.
Truth: Like all legumes, soybeans are deficient in sulfur-containing amino acids
methionine and cystine. In addition, modern processing denatures fragile
Myth: Soy foods can prevent osteoporosis.
Truth: Soy foods can cause deficiencies in calcium and vitamin D, both needed for
Myth: Phytoestrogens in soy foods can enhance mental ability.
Truth: A recent study found that women with the highest levels of estrogen in their
blood had the lowest levels of cognitive function; in Japanese Americans, tofu
consumption in mid-life is associated with the occurence of Alzheimer's
disease later in life.
Myth: Soy estrogens (isoflavones) are good for you.
Truth: Soy isoflavones are phyto-endocrine disrupters. At a dietary level, they can
prevent ovulation and stimulate the growth of cancer cells. As little as four
tablespoons of soy per day can result in hypothyroidism with symptoms of
lethargy, constipation, weight gain and fatigue.
Myth: Soy foods are safe and benficial for women to use in their premenopausal
Truth: Soy foods can stimulate the growth of estrogen-dependent tumors and cause
thyroid problems. Low thyroid function is associated with difficulties in
Myth: Soy foods are good for your sex life.
Truth: Numerous animal studies show that soy foods cause infertility in animals. Soy
consumption lowers testosterone levels in men. Tofu was consumed by
Buddhist monks to reduce libido.
Myth: Soybeans are good for the environment.
Truth: Most soybeans grown in the US are genetically engineered to allow farmers to
use large amounts of herbicides, creating toxic runoff.