Can soy cause or worsen tumors? Is it bad for my condition, which is neurofibromatosis?
A. I do not have any other testimonials from people suffering from neurofibromatosis but have many stories of people whose tumors (of many different types) have grown because of the plant estrogens in soy foods, soy milk or soy isoflavone supplements. Many of those people saw their tumors shrink after removing all forms of soy from their diets. I am a clinical nutritionist and not a medical doctor so cannot give you medical advice. But if I were in your situation, I would eliminate all soy from my diet as well as foods containing plant estrogens including flax seeds and flax oil, clover and alfalfa sprouts and margarines, spreads and other products containing sterols. Also, please do inform your doctor that soy phytoestrogens may have contributed to your situation. –Response by Dr.