It is estimated that over half the population is deficient in Vitamin D, most of them undiagnosed. A 2013 study in the International Journal of Health Sciences indicated that Vitamin D deficiency is associated with hypothyroidism. 92% of Hashimoto’s Thyroiditis patients were found to have Vitamin D deficiency in a 2011 scientific study.
Even when we are fortunate to have a doctor test our vitamin D to determine we are deficient, how much should we take? What is the optimal Vitamin D range? What is the best type of supplement to take and when?