A study found that 8 or 10 ounces a day of the purple variety has a potent effect on the blood cells called platelets, making them less likely to form clots that can lead to heart attacks. In fact, purple grape juice might be even more potent than aspirin, which is widely recommended as a way of warding off heart attacks. The researchers compared grape with orange and grapefruit juice and came to the conclusion that grape juice is better, at least for the heart. The study was led by Dr. John 'D. Folts of the University of Wisconsin Medical School. Folts noted that 10 companies make purple grape juice in the United States, and all probably work equally well.
Purple juice appears to be more potent than white.
Heart attacks occur when blood clots stick to fatty deposits on the walls of the heart's arteries, choking off the supply of blood. Now, he is looking at the anti-clotting properties of a large group of natural substances called flavonoids that are found in many different kinds of foods. Folts presented his latest findings Tuesday at a conference of the American College of Cardiology.