User's Manual: Sleep

12 Surprising Sources of Caffeine

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Caffeine can be hidden

If you’re trying to cut back, you’ve probably already reduced the amount of coffee, tea, and sodas that you consume. But the sneaky stimulant can pop up in unexpected places. Since the U.S. Food and Drug Administration (FDA) doesn’t require manufacturers to list caffeine content on nutrition labels, it’s often hard to tell whether a product contains the stimulant, and how much. These 12 sources of caffeine—some hidden, some just plain weird—could be giving you the jitters.

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