By Dr. Daniel Sheehan and Dr. Daniel Doerge

Summary: In this shocking letter, two FDA toxicology experts officially protest their agency’s decision to grant soy a health claim in 1999. “We oppose this health claim,” the researchers write, “because there is abundant evidence that some of the isoflavones found in soy…demonstrate toxicity in estrogen-sensitive tissues and in the thyroid.” Effects of such toxicity in animal testing, they add, include breast cancer, thyroiditis, abnormal brain and reproductive development (especially in infants fed soy), goiter, bodily deformities and vascular dementia—just to name a few. Granted, the researchers say, these effects are based on animal testing, but short of testing potential poisons directly on humans, animal tests “are the front line in evaluating toxicity, since they predict, with good accuracy, adverse effects in humans.” Something to think about that next time you opt for that soy-milk latte. From abcnews.com, 1999.