A month without sugar usually reduces the intake of added sugar in beverages, desserts, and snacks. Not eating sugar for a month may have some effect on skin toning, but the effect may not be significant. Relying solely on not eating sugar to tone the skin is not reliable, especially for people with existing skin conditions. But not eating sugar will indeed, to a certain extent, assist in adjusting the skin condition: 1, slow aging: sugar absorption will be oxidation, whether it is the aerobic oxidation of sugar or anaerobic oxidation, these oxidation will be carried out to accelerate the body’s oxidation process, resulting in accelerated aging of the skin. Reduce the intake of sugar to a certain extent to reduce the skin by excessive oxidative damage, which has a certain slow aging effect; 2, white skin: sugar, amino acids and proteins after a series of biochemical reactions, will generate a brown or even black material, is the end product of late glycosylation, the accumulation of such biological macromolecules under the skin, will cause the skin dull yellow. A month without sugar, reduce the black material generated by glycosylation, can assist in brightening skin tone; 3, lighten the pigmentation: long time without sugar, can assist in lightening skin pigmentation, the formation of pigmentation and pigmentation related, if reduce the intake of sugar, thereby reducing the production of some pigments, pigmentation will also be lightened to a certain extent; 4, firm skin: protein in the glycation reaction, will increase the intracellular The production of free radicals will accelerate the process of skin aging, which will lead to the loss of skin fibrin elasticity, skin gradually relaxation, sagging and wrinkles. The efficiency of skin metabolism decreases, and the aging and dead cells cannot be renewed in time, which will cause dry and rough skin, and the permeability of the skin decreases. In addition, the combination of sugar and collagen in the skin will weaken the repair effect of collagen on the skin and the ability to regenerate, which can easily lead to sagging skin. Therefore a month without sugar can partially reduce the harmful stimulation of collagen by sugar, so that the skin gradually changes in the direction of firmness and radiance. A month without sugar does not mean no carbohydrate intake, maintaining a normal carbohydrate diet is more important, no carbohydrate intake at all may lead to endocrine disruption, hypoglycemia and other occurrences, not only can not play a toning effect on the skin, but will cause harm to the body.