You only have a few weeks left to stock up on Vitamin D! Getting enough sunshine in the summer keeps your serotonin levels high all winter and prevents seasonal depression, researchers find.

Sunbathing dramatically reduces the risk of several types of cancers, autoimmune diseases, bone diseases, type 1 diabetes, depression, and, in proper doses, can even reduce the risk of melanoma, a meta-analysis of sun-related-disease studies finds