evidence: Hashimoto’s is the most common type of hypothyroidism in the United States. It’s an autoimmune disease that damages the thyroid, a gland that releases hormones that control metabolism, growth, and a number of other bodily functions. [...] Some people with Hashimoto’s disease have normal or only borderline low thyroid values in lab results. That’s because the thyroid destruction that happens during Hashimoto’s disease is intermittent. [...] I also knew that people with Hashimoto’s are more likely to be deficient in certain nutrients like vitamins B12 and D.