Caffeine in coffee and soft drinks is known for keeping people awake. It alters the circadian rhythm, which is the body’s master clock. Not getting enough sleep and being out of sync with the natural world is harmful and can be linked to diseases such as cancer and obesity. A recent study showed that caffeine can contribute to irregularities in circadian rhythm. People who drank caffeine before trying to sleep showed a delay in the release of the hormone melatonin, which typically surges at night. Studies still have to be completed about whether caffeine affects people’s inner clocks if they drink it earlier in the day. Listen to hear more about the effects of caffeine.
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