These days, many of us have our Vitamin D levels checked, and if they're low, we supplement with Vitamin D. But is that the right thing to do? Guidelines on Vitamin D screening and supplements have changed, so tune in as Dr. Lisa explains what's new in Vitamin D research. Both too much or too little Vitamin D can cause problems in our body, and increase our risk for certain health problems including osteoporosis, diabetes and cancer. Even obesity and weight loss can be impacted by Vitamin D. ...