Sunlight is very important for the human body because it provides Vitamin D. Provided the exposure to sun rays is moderate but often, Vitamin D aids the body in releasing endorphins, which elevate moods. Vitamin D also treats some skin diseases, such as psoriasis and treats Seasonal Affective Disorder (SAD). Overexposure of sun rays can prove harmful as it can cause some skin cancers. Sun protection is very necessary for people of all ages with different skin types. The following are some reasons to use sun protection on exposed skin.