vitamin d3

Factor #1: Use of Sunscreen: In order for the skin to make vitamin D, it is necessary that the skin gets UVB rays from sunshine. Consequently, sunscreens that block the sun’s UVB radiation also stop your skin from manufacturing Calcitriol (Vitamin D). This is an important factor to keep in mind, especially because sunscreen protects us from the sun’s damaging effects, including premature aging of the skin and skin cancer.