Sun rays have many benefits, including the following: Sun rays are the most important source of vitamin D3, and this vitamin is one of the most important vitamins needed by the human body and one of the benefits of this vitamin is countless that is necessary for the growth of human bones, and the benefits of exposure to sunlight linked to the importance of this vitamin Of the body. Sun rays increase the level of the hormone happiness and this hormone responsible for the sense of satisfaction, and rid the body of depression, especially if exposure to the sun accompanied by exercise.