Should I take vitamin d?

We all need some D. Yes, if one does not get enough from foods, drinks, or other supplements. Long term vitamin D deficiency in adults can lead to osteomalacia (bone softening) and osteoporosis (bone density loss, causing easy fracturing). Other symptoms of a deficiency of vitamin D are muscle pains, muscle weakness, and aches in the bones. Prolonged vitamin D deficiency in children causes rickets (bony deformities).