<prompt> Answer this question truthfullyWhat is Hashimotos Thyroiditis, and what are its effects on the thyroid gland?  <response>: <reason> Hashimotos Thyroiditis is an autoimmune disorder that affects the thyroid gland. It is characterized by the immune system attacking the thyroid gland, which can initially cause hyperthyroidism an overactive thyroid but eventually leads to hypothyroidism an underactive thyroid. Hashimotos Thyroiditis is the most common cause of hypothyroidism in the United States. Symptoms of Hashimotos Thyroiditis can include fatigue, weight gain, constipation, dry skin, hair loss, and sensitivity to cold. The condition is typically diagnosed through blood tests that measure thyroid hormone levels and the presence of antibodies against the thyroid gland. Treatment for Hashimotos Thyroiditis typically involves thyroid hormone replacement therapy to restore normal thyroid function. 