The role and efficacy of light salt water is as follows: 1, when the body after strenuous exercise, the body will lose water and salt because of sweating, so the supplementation of a certain amount of light salt water can relieve the body of water and salt loss, for the maintenance of physiological function has a very good role. 2, a glass of light salt water in the morning, but also to relieve the time because of food residues in the intestinal tract, to replenish the necessary water, is to get up early in the morning The first thing you can do is to drink a glass of light salt water to relieve constipation, but also to improve some of the bad factors in the body caused by the accumulation of oral odor. 3, light salt water also has a very good swelling, bactericidal effect, the use of light salt water gargle, the anti-inflammatory effect of the mouth, inhibit the growth of bacteria in the mouth, as well as chronic pharyngitis, tonsillitis have a very good anti-bacterial, anti-bacterial effect.