Grape juice composition
The grape variety determines the composition of its juice. So in 100 g of juice can contain: 55-87 g of water, 0,15-0,9 g of proteins, 10-30 g of carbohydrates, 0,5-1,7 g of tartaric, malic and other organic acids, 0,3- 0.6 g of dietary fiber, 45 mg of calcium, 250 mg of potassium, 22 mg of phosphorus, 17 mg of magnesium, as well as small amounts of iron, cobalt and other minerals. Of the vitamins, the grape juice contains vitamins C, B1, B2, P, PP, provitamin A. Other vitamins are also found, but in smaller quantities.
The grapes contain sugars, which are easily assimilated - fructose and glucose. Since the grapes and its juice contain a large amount of potassium, it is recommended for use by people with diseases of the cardiovascular system.
The complex composition of grape juice can be compared with the composition of mineral waters. On 80% it consists of water, which is rich in vitamins, acids, mineral salts and dissolved sugars. Therefore, grape juice has a refreshing and tonic effect, contributes to the fact that the fluids and mucus in the body become less concentrated, there is an improvement in their secretion, the intestines are cleaned, etc.
Grape juice is very nutritious - the sugar content in it can reach 30%. Grape sugar, getting into the body, converted into glucose and then absorbed into the blood, and they serve as a source of carbon. The liver processes sugar into glycogen, creating reserves of carbohydrates, as a necessary reserve for the proper functioning of the body. Grape juice also has antioxidant properties, and protects against decay in our cells of certain protein molecules.
Useful properties of grape juice
As part of the juice of grapes, many pectin substances that help reduce the level of "bad" cholesterol and remove free radicals from the body. However, different grape varieties have different useful properties. So the juice from dark varieties will be useful to women, as it prevents the development of breast cancer.
Anthocyanin - a pigment that is contained in grape juice, does not allow cancer cells to develop, and if they are present - slows their spread. In this case, the protective properties of the body also increase.
Juice from light grape varieties contains more iron, so it contributes to a surge of strength. Dark grape juice on the contrary reduces the level of iron, but it has stronger antioxidant properties.
The use of grape juice helps to cleanse the liver, improve the process of hematopoiesis, improve the functioning of the intestines, relieve joint pain, normalize the functioning of the heart muscle.
Grape juice is very useful for the elderly, because it helps to restore the brain's work - even with Alzheimer's. It also slows the development of age-related myopia and can be used to prevent cataracts.
Include grape juice in the diet is recommended for diseases such as nephritis and nephrosis, anemia, the initial stage of tuberculosis, gout, obesity, rheumatism, neuroses. However, as with any kind of treatment, there are contraindications to the use of grape juice.
Contraindications for grape juice
The use of grape juice is not recommended for excessive obesity, urination disorders, liver cirrhosis, in the second half of pregnancy and with pronounced caries of teeth. Also, with caution juice should be drunk with diabetes.
In acute fever, severe exhaustion, oncology, late stages of tuberculosis, heart defects, ulcer of the intestine and stomach, grape juice is categorically contraindicated.