The special value of the grape lies in the fact that is a very quick repairer of bodily waste, the grape sugar being taken immediately into the circulation without previous digestion. For this reason is grape juice the best possible food for fever patients, consumptives, and all who are in a weak and debilitate condition. The grapes should be well chewed, the juice and pulp swallowed, and the skin and stones rejected.
In countries where the grape cure is practiced, consumptive patients are fed on the sweeter varieties of grape, while those troubled with liver complaints, acid gout, or other effects of over-feeding, should take the less sweet kinds.
People who suffers from malaria may use grapes with great benefit. The grapes with its skins and stones, should be well pounded in a mortar and allowed to stand for three hours. The juice should then be strained off and taken. Or a person with good teeth may also eat the grapes, including the skins and stones, if they thoroughly macerate the latter.

In the absence of fresh grapes raisin(dried grape) tea is a restoring and nourishing drink. It is noted to be of the same value as milk, if made in proportions given below. It is much more easily digested than milk, and is therefore of great use in gastric complaints.
People suffering from chronic gastritis could not do better than make raisin-tea their sole drink, and bananas their only food for a time.

To make raisin-tea: Take half a pound of good raisins and wash well, but quickly, in lukewarm water. Cut up roughly and put it into the old fashioned beef-tea jar with a quart of distilled or boiled and filtered rain water. Cook for 4hrs, or until the liquid is reduced to 1 pint. Scald a fine hair sieve and press it all through, except the skins and stones. If desired, you can add a little lemon juice.
https://health2daytips..com.ng/2018/02/the-medicinal-benefits-of-grape-fruits.html#more

Grape is blood tunic fruits which contain vitamin k,c.