Vitamin D is touted for its miracle abilities. There are claims that it might help prevent colon, prostate, and breast cancers; that there is a possibility it may help to treat diabetes, heart disease, high blood pressure, or MS (multiple sclerosis); and that your levels have to be in a specific zone for you to have better hormone health. 

Let's evaluate data to see if these claims are true, and establish the exact levels you need to have a healthy thyroid and healthy hormones.