Many of your organs give you warning signs when something's off. You can feel the effects of too much fried, fatty, or spicy food in your stomach. Your gut will let you know when you're not getting enough fiber. But with your kidneys, the signs are a little more subtle. Since they work hard to filter toxins and waste from your blood, kidney problems can show up as muscle cramps, swelling in your hands or feet, or even itchy skin.

Healthy kidneys need plenty of water to flush out toxins, keep your blood pressure in check, and help prevent kidney stones and urinary tract infections (UTIs). The problem is, plain water can feel a little boring if you're used to sweet, sour, or savory flavors.

(Read about what you're doing that may be hurting your kidneys .)

One way to make water more in

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