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12 Surprising Sources of Caffeine

These 12 sources of caffeine, some hidden, some just plain weird, could be giving you the jitters.

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Weight-loss pills

Caffeine really doesn’t do much to shrink your waistline, yet diet pill manufacturers have overloaded their pills with the stimulant. For example, taking 1,223 milligrams in a daily dose of Zantrex-3 is like having 12 cups of coffee, according to a 2005 analysis conducted by ConsumerLab.com.

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