Graves disease is the most common cause of hypothyroidism.

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Multiple Choice

Graves disease is the most common cause of hypothyroidism.

Explanation:
Graves disease causes overproduction of thyroid hormones due to autoantibodies that stimulate the TSH receptor, leading to hyperthyroidism, not hypothyroidism. It is the most common cause of hyperthyroidism, while hypothyroidism most often results from autoimmune Hashimoto's thyroiditis, which damages the thyroid and reduces hormone output. In iodine-sufficient populations, Hashimoto's is the typical cause of hypothyroidism. So the statement is false.

Graves disease causes overproduction of thyroid hormones due to autoantibodies that stimulate the TSH receptor, leading to hyperthyroidism, not hypothyroidism. It is the most common cause of hyperthyroidism, while hypothyroidism most often results from autoimmune Hashimoto's thyroiditis, which damages the thyroid and reduces hormone output. In iodine-sufficient populations, Hashimoto's is the typical cause of hypothyroidism. So the statement is false.

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