Harvard Health Letter
Do vitamin D supplements reduce risk of early death?
Ask the doctor Q. Iíve been taking vitamin D supplements for several years because my doctor said they might help me live longer. Am I wasting my money, or even causing myself harm? A. Youíre right to be skeptical. Vitamin supplements of all types repeatedly have been tested for theoretical health benefits, and often the studies have shown none. Thereís no doubt that vitamin D supplements can help prevent or treat osteoporosis.