In order to prevent and eliminate sub-health in daily life, urbanites need to take the initiative to keep fit. For example, when you are not tired, take the initiative to rest and let your body recharge before doing it. This is better than continuous drying, and it won't hurt your health. For example, don't wait for thirst before drinking water. Water is the source of life, and the human body always needs the nourishment of water to maintain its vigorous vitality. For another example, don't wait until the symptoms of various vitamins and trace elements appear, or even when diseases occur, then consider supplementing vitamins and trace elements. It's too late, and the loss is too great. If we can adjust the diet structure, supplement vitamins and trace elements to meet the needs of the human body, we can ensure health. In addition, experts remind consumers not to blindly supplement vitamins and minerals in large quantities, which is not conducive to health.