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Insomnia or poor sleep
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Anxiety or nervousness
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Increased heart rate
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Stomach irritation
The Bottom Line
For most healthy adults, drinking coffee in moderation is considered safe and may even provide some health benefits. However, balance is important. Too much caffeine can have negative effects, especially for people who are sensitive to it.
So the next time you enjoy your morning cup of coffee, remember: a little can be helpful—but too much may do more harm than good.
