In general, I say it is better to eat fruit than to drink juice. Recent research, though, has found that some juices are better than actual fruit for preventing clogged arteries, which lead to heart disease. Well, at least this is true for hamsters.
Eating and drinking the juice of both grapes and apples can help prevent arteries from clogging. A team from The University of Montpellier tested these fruits and juices on hamsters while feeding them a high fat diet. They discovered that compared to those only given water, the hamsters that consumed fruit or fruit juice had lower levels of cholesterol and less fat accumulating in their arteries. To see which juice was most beneficial and in what quantity read more.
Purple grape juice was the most beneficial (it contains the highest amount of phenols, an antioxidant), followed by purple grapes, apple juice, and then apples. The only bad news is you'd have to eat three apples, three bunches of grapes, or four glasses of fruit juice a day to reap the benefits. Also, there was no info about whether or not these fruits and juices had any effect on existing clogged arteries.