There are a few thousand kinds of grapes with very different chemical composition.

Grapes are 65-85% water, 10-33% sugar (glucose and fructose),
phlobaphene, gallic acid, silicic acid, quercetine, anin, glucosides - mono delphinidin and delphinidin, fruit acids, like apple acid, salicilic acid, phosphoric acid, lemon acid, amber acid, formic acid and a little bit of oxalic acid, pectins, tannic substances, salts of potassium, magnesium, calcium, manganese, cobalt, iron and vitamins B1, B2,В6, В12, А, С, Р, РР, K, folic acid and enzimes.

Grape skin has tannic substances and essential oils.

Grape seeds have tannic substances, phlobaphene, lecithin, vanilla and fatty oil.

Grape leaves have sugar, quercetine, carotene, inosite, tannic substances, betain, tartaric acid, apple acid, ascorbic acid, protocatechine acid, potassium, sodium, iron and silicon.
Grapes have been used for treating metabolism disorders, liver, kidney and lung disorders and cardiovascular problems. Grapes improve metabolism and have diuretic, anti inflammation, light laxative and inducing perspiration effect.

Grapes help with nervous exhaustion, hypertension, high blood pressure, bronchitis and gout. Eating grapes strengthens your body when you need to recover from anemia, gastritis with high acidity, metabolism disorder, chronic insomnia and constipation.

It is recommended to include grapes in your diet in the first stage of tuberculosis.

Drinking grape juice daily for a long time helps to lower high blood pressure.

There many grape home remedies in folk medicine.

Extract of grape leaves (boil 1 part of grape leaves with 10 parts of water for 15 min, let it cool and filter it ) is used for gargling your throat if you have angina and for washing your body if you have skin disorders.

You should eat raisins, if you cough, have an angina, ulcers in your mouth, bladder disorders and hemorrhoids.

Warnings: 

Grapes and grape juice are not recommended for obesity, stomach ulcers, diabetes, colitis, diarrhea and dysentery.

You will get an upset stomach if you eat grapes with milk, cucumbers, melon, fish, beer, mineral water and fatty meals.

If you have a cavity in a tooth, eating grapes or drinking grape juice will intensify your tooth destruction. Rinse your mouth every time you eat grapes.

Many of us work hard to maintain our muscle stamina and flexibility. If you don't, you should. You should also consider what kind of shape are you in, inside? Are your blood vessels - which continuously carry blood to your muscles - also in great shape?

Scientific evidence shows adding quality grape seed extract to your diet may improve your blood flow and reduce your chances of having a heart attack or stroke, and may also benefit your daily work-out routine.

Researchers have long claimed that red wine, concord and rubired grape juice, as well as high-quality grape seed extracts, are good for the heart. Some studies indicate that substances found in grapes and grape seed extracts may:

1. Reduce your risk of cancer and strokes.

2. Reduce hypertension (high blood pressure) and improve circulation.

3. Reduce atherosclerosis (hardening of the arteries)

4. Increase calorie burning

5. Nourish organs and muscles, helping them to work more effectively.

6. Enhance physical endurance.

You would have to eat a lot of grapes or raisins, or drink gallons of wine, to consume the same level of active components analyzed in most studies. While this would not be practical for the average consumer, there is a better way.

High-quality grape seed extract is an excellent alternative because it is a pure source of procyanidins, compounds believed to be responsible for grape's benefits without the added calories, sugar or alcohol.

Grape seed extracts have properties that are comparable to another well-known molecule: Nitric Oxide (NO), as the two have similar metabolic pathways. One patented ingredient, available as Mega-Natural-BP, has been shown to affect the flexibility of blood vessels. Blood vessel walls are, like all tissue, a collection of cells. This grape seed extract acts on the endothelial cells which contributes to the tone, or flexibility, of the blood vessel wall.

This powerful circulatory effect lends the use of premium grape seed extract to at least three applications that appeal to the health-conscious, waistline watchers and muscle heads(gym buffs) alike.

According to the 2006 Update of Heart Disease and Stroke Statistics published in Circulation, about one in three U.S. adults have hypertension, or high blood pressure. It's the number one risk factor for having a stroke, and contributes to heart attacks, heart failure, kidney failure and hardening of the arteries.

A recent study indicates grape seed extract may help in all of those areas - a major benefit to anyone concerned with his or her long-term health. That's great news for the one third of adults who must manage this condition.