By Ava Feuer, REDBOOK.
We cautiously hopped aboard the juice-cleanse wagon, trying a three-day program and gathering some of our favorite recipes. However, until now all the hype has been just that-a craze that supporters claim helps them feel great, shed pounds, and get their systems in whack-but one without the backup of the medical community.
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A case study published in the September issue of the American Journal of Medicine is the first to find that juicing can actually cause us some harm. After six weeks of consuming common juices, including those from beets, collard greens, kiwi, parsley, spinach, and soy, the patient experienced acute renal failure, meaning that his kidneys stopped working properly. Granted, this person already suffered from kidney disease, and his juice-fast was an unusually long one, putting him at far greater risk than the average person. But researchers' discovery that the problem was oxalate, a naturally occurring substance found in some fruits, vegetables, and nuts, led them to warn that "it is prudent to calculate daily oxalate consumption. For commercial juicing products, it is critical to label the oxalate content and provide the limit of daily consumption for consumer protection."
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