Soy (tofu) consumption and fertility
Dear Dr. Joshi - I see that a significant number of Indians, especially 2nd generation Indians, who live away from parents (students or young professionals) rely on Tofu for their protein intake. I read somewhere that Tofu toxicity can lead to fertility issues later in life. Is this true? Should this be of concern for our youngsters? Thank You
Tofu and other soy foods are safe protein sources and are not linked to infertility. The isoflavones in soy act as very weak plant estrogens and human studies—including randomized trials, systematic reviews, and large cohort investigations—show that normal soy intake does not reduce sperm count or testosterone in men, nor does it impair menstrual cycles, ovulation, or overall fertility in women. Moderate consumption (about 1–2 servings per day, e.g., ~100 g tofu, 1 cup soy milk, or a serving of edamame) falls within the ranges studied and may even support favorable cardiometabolic markers and lipid profiles. Individuals with a soy allergy should avoid soy, and those taking levothyroxine for thyroid disease should separate soy intake from the medication by 3–4 hours. Otherwise, there is no toxicity or fertility concern. For balanced nutrition, encourage young adults to include a variety of protein sources such as dal, rajma, chana, dairy/curd, eggs (if tolerated), nuts/seeds, and fish or chicken for non‑vegetarians alongside soy.