What benefits does the sun have for human health?

The best time to bask in the sun is from 6 am to 9 am. Sunlight mainly warms the human body, which can promote blood circulation and metabolism and enhance human vitality. At 9 ~ 10 a.m. and 4 ~ 5 p.m., there are many components in the A-beam of ultraviolet rays, which can promote the production of vitamin D in the body, promote the absorption of calcium and phosphorus in the intestine, promote the normal calcification of bones and prevent the occurrence of osteoporosis.