The benefits of sunlight are numerous, not only to replenish calcium, but also to accelerate the blood circulation of our body organs, prevent osteoporosis, prevent pediatric rickets and so on, especially in the cold weather of winter, more sunlight is a smart way to maintain health. However, the winter weather is cold, some people like to sunbathe in the house through the glass, so sunbathing can be calcium. The actual fact is that there is no calcium effect in the sun through the glass, because the glass can absorb a large part of the ultraviolet ray, which is needed by the human body, is isolated from the ultraviolet ray of the sun actually sun more effect is not much. Therefore, experts encourage the public should go out more, in the fresh air sunny place sunshine. In addition, there are two major misconceptions to avoid when sunbathing. One is that the effect is better if you sunbathe for a long time, this approach is wrong, because no matter which season, between 10 a.m. and 4 p.m., especially between 12 noon and 4 p.m., the longest sunbathing is contraindicated, because the ultraviolet rays at this time will cause harm to human skin. The second is to eat after the sun can promote nutrient absorption, which is also unscientific practice. Experts remind that before sunbathing do not eat mustard, lettuce, snail, shrimp, crab, mussels and other photosensitive food, so as not to cause photosensitive drug rash or solar dermatitis, especially children should pay attention. The best time period for sunbathing In fact, there are two time periods in the day that are most suitable for sunbathing. The first is from 6am to 10am, when infrared rays prevail and ultraviolet rays are low, making people feel warm and soft, which can play a role in activating blood circulation and resolving blood stasis. The second is from 4:00 p.m. to 5:00 p.m., when the a-beam of ultraviolet light prevails, which can promote the absorption of calcium and phosphorus in the intestinal tract, which is conducive to enhancing physical fitness and promoting normal bone calcification. Healthy people should insist on sunbathing for 30-60 minutes every day. Be sure to drink more water and eat more fruits and vegetables after sunbathing, which can inhibit the generation of melanin and prevent sun spots. Can not do often go out on the sun, especially the fast-paced work, mental stress white-collar, but also can be appropriate to take some calcium supplements, choose containing high concentrations of calcium and high concentrations of vitamin D, to help better absorption of calcium.