Originally Posted by Rook
The talk: [/B]It speeds up your metabolism.
The truth: "This is an urban legend," says Liz Applegate, Ph.D., director of sports nutrition at the University of California in Davis. "There is no valid research proving it."
Another, albeit contradictory, myth: Coconut water makes you fat. This bad rap came from coconut milk, which is made from pressed coconut meat and packs 445 calories per cup, most from saturated fat. The water (the fluid in young coconuts) has only 46 calories per cup. Of course, for a truly trimming sip, opt for zero-calorie water, coffee or tea.
The talk: It's nature's sport drink
The truth: It's a fine post-workout chug for the average active Jane, but it falls short for more hard-core athletes.
The gist: When you exercise, you sweat out a lot of sodium and some potassium. You should replace both after intense sweat sessions (more than an hour a day), so your muscles contract properly. Coconut water is a potassium powerhouse, delivering roughly 600 milligrams per cup, about 175 mg more than a banana does and 13 times what most sport drinks offer. "The problem is that it has only about 30 milligrams of sodium per cup; we lose much more than that during a long workout," Applegate says. Thus, serious athletes may need a sport beverage with a higher sodium-to-potassium ratio, such as Gatorade or Powerade Ion4; lighter exercisers can rehydrate with whatever they like best, including coconut water or plain H²O.
The talk: It makes you look younger
The truth: Coconut water contains cytokinins, plant hormones shown to slow the aging process in plants and fruit flies, according to a study in Molecules. Alas, the benefits aren't yet proven in humans. The search for the fountain of youth continues.
The talk: It's a hangover helper
The truth: There's a reason the morning after a bender is so painful: Alcohol dehydrates you, leading to nausea and headaches. Like any drink, coconut water refills your H²O stores, but plain water does the job just as well, notes Samir Zakhari, Ph.D., director of the Division of Metabolism and Health Effects at the National Institute on Alcohol Abuse and Alcoholism. As for electrolytes, our kidneys preserve them when we drink, so there's no need to replace them with coconut water. If the taste lifts your postspirits spirits, go for it; but you can save cash (and calories) with the tap.
The talk: It protects your ticker
The truth: Diets high in potassium can help lower blood pressure and promote heart health, says Andrea Giancoli, R.D., spokeswoman for the American Dietetic Association. Coconut water is a good source of the mineral, but it's better to get it from whole foods like veggies (spinach, sweet potatoes) and low-fat milk, which supply additional heart-healthy nutrients such as fiber and vitamin D.
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