But is the sun good or bad for us? The latest studies say that we should not be afraid of our star, because the advantages of exposure far outweigh the disadvantages. While it is true that the rays can increase the risk of skin cancer, at the same time they reduce the risk of many other diseases. This is down to vitamin D. Radiation is essential for the synthesis of this molecule, which has an important protective role for our body. The only rule in order to enjoy all the benefits of the sun: increase sun exposure gradually in the cooler hours, adequately protected by a good suncream.