Grapes (Vitis vinifera) have been heralded for their medicinal and nutritional value for thousands of years. Egyptians ate grapes at least 6,000 years ago, and several ancient Greek philosophers praised the healing power of grapes, usually in the form of wine. European folk healers made an ointment from the sap of grapevines to treat skin and eye diseases. Grape leaves were used to stop bleeding, inflammation, and pain, such as the kind brought on by hemorrhoids. Unripe grapes were used to treat sore throats, and dried grapes (raisins) were used for constipation and thirst. Round, ripe, sweet grapes were used to treat a range of health problems including cancer, cholera, smallpox, nausea, eye infections, and skin, kidney, and liver diseases.
Grape seed extract is sometimes suggested for the following, although evidence is slight:
- Alzheimer disease.
- Diabetes (improving blood sugar control)
- Improving night vision.
- Protecting collagen and elastin in skin (anti-aging)
- Treating hemorrhoids.
- Protecting against oxidative rancidity and bacterial pathogens.
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