Grapes come in different colors and forms. There are red, green, and purple grapes, seedless grapes, grape jelly, grape jam and grape juice, raisins, currents, and sultanas, not to mention wine. Today, 72 million tons of grapes are grown each year worldwide, mostly to produce wine. Every year, 7.2 trillion gallons of wine are produced. Grapes are also a popular finger food. The nutrients in grapes offer a number of possible health benefits. They have been associated with prevention of cancer, heart disease, high blood pressure, and constipation.