Because the nutrients of the flesh are complete, except for a slightly higher Vc content (25 mgVc per 100 g), the other contents are very low, and the main nutrient of the grapes is its phytochemical active substance, most of which is present in Skin and seeds. among them:
Organic acids
Organic acids in grapes are mainly found in the skin, with tartaric acid and malic acid as the main components. Can well promote the secretion of salivary glands to help digestion; promote the absorption of iron: trivalent iron in plants can not be directly absorbed by the body, need the help of organic acids can be converted to divalent iron to be absorbed; to promote the absorption of calcium: everyone We all know that when you are pregnant, you really want to eat sour because the body needs a lot of calcium to promote the absorption of calcium. The organic acids in fruits are the best assistants to assist calcium absorption. But the taste is particularly sour, but also accompanied by a bitter feeling
Anthocyanins
Mainly present in the skin, anthocyanins are currently one of the best free radical scavengers and are the body's defense fighter. All things related to free radicals, it can participate (such as cancer, enhance the immune system, vascular disease, anti-inflammatory, anti-radiation, etc.), but also can promote the regeneration of rhodopsin cells in the retina, prevent myopia. Among them, black grapes are particularly rich.
Resveratrol
It is mainly found in grape skins and grape seeds. It is one of the enemies of cancer. It has good effects on breast cancer, oral cancer, stomach cancer, liver cancer, and prostate cancer. It can regulate immunity and inhibit the activity of cell cancerous enzymes. , Induction of cancer cell apoptosis, etc.
Quercetin
It is the main component of flavonoids in flavonoids, and it is also often ingested. Many fruits and vegetables (grapes, mangoes, tea, onions, etc.) are present. Medical research proves that quercetin has good resistance to viruses and tumors, which can increase the expansion of capillaries, reduce the brittleness of capillaries, expand coronary arteries, and increase blood flow.
Tannin
It is an acidic substance in plant polyphenolic compounds. Exist in grape skin and grape seed, there is its existence, there will be astringency, its most prominent physiological function is to prevent cardiovascular disease and anti-cancer activity.
grape seed oil
The grape seed oil is mainly based on the polyunsaturated fatty acids required by the human body. It plays an important role in the development of the brain of infants and young children and the recovery of cells. It can also help clear "bad" cholesterol in the blood.
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