Vitamin A improves thyroid health
by Newsletter Editor
The thyroid releases hormones that stimulate metabolism in every cell in the body. Vitamin A helps regulate thyroid hormones and doctors wanted to test its effect on obese individuals, who commonly have low thyroid function, or hypothyroidism.
In the study, 28 non-obese healthy premenopausal women took 25,000 IU of vitamin A (retinyl palmitate) per day while 56 obese healthy premenopausal women took the vitamin A or a placebo. Doctors measured levels of thyroid-stimulating hormone, which is higher when the thyroid is underactive and lower when thyroid function is normal.
After four months, both obese and non-obese women who had taken vitamin A had much lower levels of thyroid-stimulating hormone, and higher levels of circulating thyroid hormones. Doctors concluded that vitamin A may reduce early-stage hypothyroidism in premenopausal women.
Reference: J Am Coll Nutr. 2012 Aug; 31(4): 268-74