Hello, there is an important acid-base balance pair in the human body-sodium bicarbonate and carbonic acid. When the acidity is strong, carbonic acid is decomposed into carbon dioxide and water, and carbon dioxide is excreted with respiration. Sweat and urine can also excrete acid, drink plenty of water and exercise, increase sweating and urination, and promote acid excretion.

When eating grapes, most people spit out the skin, because the skin is astringent and will lose a large part of the nutrition from the skin. Nutritionists have found that grape skin contains more resveratrol than grape meat and grape seeds. Resveratrol is a polyhydroxy phenolic compound. This substance can not only prevent cardiovascular and cerebrovascular diseases, but also has strong anti-cancer ability. In addition, grape skins, especially purple grape skins, contain a flavonoid that can lower blood pressure. Flavonoids can promote the increase of high density lipoprotein in blood, thus reducing the content of harmful cholesterol in blood, preventing atherosclerosis and protecting the heart. Studies have shown that the darker the color of grape skin, the higher the content of flavonoids.

Grape skin is also rich in cellulose, pectin and iron, which can supplement the nutrition lacking in modern people's diet. At present, people have begun to study the use of grape skin residue as an additive to process food, so that resveratrol, cellulose, flavonoids and other rich substances contained in grape skin can be used to treat hypercholesterolemia, diabetes and other diseases.