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South Africa

Sip some rooibos tea

Enjoyed throughout the country, rooibos tea is more robust than green tea, and because it's naturally sweet, it needs no sugar. Ditching your daily Frappuccino for a cup of rooibos—Starbucks now sells it—could save you thousands of calories per month.

"Tea-drinking cultures generally have lower rates of obesity," says Dr. Pescatore. "That may be from special compounds, such as catechins, that certain teas contain, or it may simply be that we often think we're hungry when we're really dehydrated."

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