Sunscreen linked to Thyroid Disease? 2 problem ingredients

Sunscreen Inhibits Thyroid Function

Animal studies Rats treated with 4MBC and Benzophenone 2 (BP2) for five days found to have significantly increased TSH and lower T4. Weight of thyroid glands increased All above results prevented if there was adequate iodine present “The work has shown that MBC and BP2 are potent disrupters of the pituitary-thyroid hormonal system in rats. If the same effect is discovered in humans, then we may have to rethink how we protect our children and those with existing thyroid problems or those in iodine-deficient areas from sun exposure.”