Nutritional value and health benefits of purple grapes

Grapes account for about 1/4 of the world's fruit production and can be said to be the most popular fruit in the world. Now it is the season for grapes to ripen. Faced with a wide variety of grapes in different colors, do you know which one has the highest nutritional value and health function?

Understanding Purple Grapes

Grapes are the fruit of the plant Grapeaceae. Originally produced in West Asia, they are produced in all places north of the Yangtze River Basin in my country, mainly in Xinjiang, Gansu, Shanxi, Hebei and other places. There are many varieties of grapes, which are divided into oriental variety groups and European variety groups according to their origins. "Longan", "Seedless White", "Milk", "Black Chicken Heart" and other varieties with a long history of cultivation in my country all belong to the oriental variety group. "Rose Fragrance" and "Gary Niang" belong to the European variety group. The fruits are picked when they are ripe in September and October every year, and used fresh or dried in the shade for later use.

The sugar content of grapes is 8% to 10%. In addition, it also contains a variety of inorganic salts, vitamins and a variety of substances with physiological functions. Grapes are also rich in potassium.

Nutritional value of purple grapes

1. The sugar in grapes is mainly glucose, which can be quickly absorbed by the human body. When the human body has hypoglycemia, drinking grape juice in time can quickly relieve the symptoms;

2. French scientists have found that grapes can prevent thrombosis better than aspirin, and can lower human serum cholesterol levels and reduce platelet cohesion, playing a certain role in preventing cardiovascular and cerebrovascular diseases;

3. The flavonoids contained in grapes are a powerful antioxidant that can resist aging and remove free radicals in the body;

4. Grapes contain an anti-cancer trace element that can prevent healthy cells from becoming cancerous and stop the spread of cancer cells. Grape juice can help organ transplant patients reduce rejection reactions and promote early recovery.

Among all grapes, purple grapes have the best nutritional value.

There are thousands of grape varieties in the world, which can be divided into two categories: wine grapes and edible grapes. There are more edible grape varieties. In addition to Kyoho and Rose, Xinjiang's Mare's Milk Grape, Seedless White Grape, Hebei White Milk Grape, Shandong Longyan Grape and Sichuan's Green Grape are all famous and delicious. Among them, Xinjiang's Seedless White is the most precious, known as the "Green Pearl", and it is the sweetest grape. Seedless White Grape and Mare's Milk Grape are very similar and often difficult to distinguish. "Seedless White" has oval berries, yellow-green or green-white, thin skin, and no seeds; while Mare's Milk Grape has small seeds and is white-green. There is also a kind of grape with large berries, thin skin, and hard to separate skin and flesh, which is called "Raisin". According to different colors, it is divided into red grapes, black grapes and green grapes. In addition, Rose's Milk Grape is the most fragrant grape. It is suitable for eating raw and can also be used as a raw material for making wine.

Grapes are rich in nutrients, with a sugar content of 10%-30%, mainly glucose. The fruit acid in grapes helps digestion, and eating more grapes can strengthen the spleen and stomach. Grapes are rich in calcium, potassium, phosphorus, and iron, which can promote kidney function and reduce the risk of coronary heart disease. Grapes are also rich in B vitamins, vitamin C, and a variety of essential amino acids. Eating grapes regularly is beneficial for neurasthenia and excessive fatigue. Modern medical research also shows that grapes have anti-cancer and anti-cancer effects.

In terms of nutrition, the darker the color of the grapes, the higher the nutritional value. Because the darker the color of the grapes, the higher the content of pigment substances. Such substances can strongly fight against vascular sclerosis, protect the heart and prevent cerebral stroke. Some studies have shown that the darker the color of the grape skin, the higher the content of flavonoids, and the stronger the effect of lowering blood pressure. Therefore, the nutritional value of Kyoho, Rose Fragrance, etc. is higher than that of green grapes, seedless white grapes, etc. Grape skins and grape seeds also contain a large amount of resveratrol, which has a very high anti-cancer effect. It is best to eat grapes with the skin and seeds for the most nutrition.

Health benefits of purple grapes

As summer approaches, grapes are available in large quantities. Grapes are sweet and delicious, rich in nutrients, and contain glucose, fructose, protein, fat, organic fruit acid, multiple vitamins, multiple amino acids, and multiple inorganic salts such as potassium, calcium, iodine, phosphorus, and iron. Li Shizhen said in Compendium of Materia Medica that grapes can expel water and promote diuresis, replenish qi and blood, nourish the brain and mind, relieve restlessness and improve eyesight, and quench thirst. Grapes have the following health benefits:

Strengthens the spleen and stomach

The sugar content of grapes is 15% to 30%, mainly glucose. The fruit acid in grapes can help digestion, and eating grapes regularly can strengthen the spleen and stomach. Grapes contain minerals, vitamins and amino acids required by the human body, and eating grapes regularly is very beneficial for neurasthenia and excessive fatigue. After grapes are made into raisins, the sugar and iron content will be relatively increased, making them a good tonic for women, children and the weak and anemic. The sugar in grapes is a monosaccharide that can be quickly absorbed by the human body, especially when the human body has hypoglycemia, if fresh grape juice is drunk in time, the symptoms can be quickly relieved.

Soften blood vessels

Grapes have a thrombolytic effect similar to aspirin. Foreign scientists have found that there is a natural anti-cholesterol substance and antifungal compound in the skin, core and juice of grapes, which can fight human serum cholesterol and reduce platelet cohesion, and have a certain effect on preventing vascular sclerosis, coronary heart disease, embolic cerebral infarction, cerebral thrombosis, hypercholesterolemia, fatty liver and retinitis. American researchers have found that if you drink 3 cups of purple grape juice every day, the cohesion of platelets can be reduced by 40%, which is similar to the thrombolytic, anti-coagulation and fibrinolytic effects of aspirin, and has a certain effect on preventing cardiovascular and cerebrovascular diseases. This is mainly due to the flavonoids contained in grapes. This is a powerful antioxidant that can prevent cell membranes from being oxidized and can remove free radicals in the body. Grape skins contain more flavonoids, so it is best not to peel grapes when eating them.

Weight loss effect

Eating grapes correctly can help you lose weight. The method is to chew 300 grams of grapes slowly before meals, and then eat some foods rich in protein and low in fat, such as braised beef, stewed rabbit meat, fried leeks with dried tofu, etc. 300 grams of grapes will make you feel full in your stomach, and high-protein food will prolong the digestion time, which can keep you from feeling hungry for a long time.

Anti-cancer function Grapes have anti-cancer function, which was discovered by the University of Illinois in the U.S. Grapes contain a substance that can prevent healthy cells from becoming cancerous and prevent the spread of cancer cells.

Skin care effect

Grape polyphenols are not actually a single nutrient, but a complex molecule composed of multiple components in grape stems, seeds, and skins, including flavonoids, tannins, coumaric acid, catechins, oligo-op-phenyl proanthocyanidins (OPCs), etc. They have multiple functions, such as strengthening and promoting blood circulation, protecting the skin's collagen and elastic fibers, preventing ultraviolet damage to the skin, protecting and enhancing the resistance of skin tissue. Therefore, they can improve skin aging problems such as dryness, spots, wrinkles, sagging, roughness, and sensitivity caused by the generation of free radicals, and achieve moisturizing, whitening, anti-wrinkle, and anti-aging effects simultaneously, restoring the healthy luster of vibrant skin.

Nourishes the liver and kidneys

Grapes are mild in nature, sweet and sour in taste, and can nourish the liver and kidneys, produce body fluids, and strengthen the bones and muscles. They can be used as a tonic for people with fever, thirst, loss of appetite, chronic liver and kidney yin deficiency, palpitations, night sweats, dry coughs, back and leg pain, and weak bones and muscles. Grapes can also replenish qi and blood, and promote urination. They are used for spleen deficiency, weak qi, shortness of breath, fatigue, edema, and difficulty urinating. You can mash the grapes to extract the juice, simmer it over a low fire until it is slightly sticky, add an appropriate amount of honey, heat it to a boil, and take it after cooling, 1 tablespoon each time. In addition, according to data, grapes, grape juice, and wine also have the effect of resisting viruses.