1.Interferes With Sleep
Too much caffeine can make it hard to nod off when you go to bed at night. Even moderate amounts can cause insomnia in some people, especially if you have it too close to bedtime. The effects may be worse as you age. Avoid caffeine in the afternoon and evening if you notice it affects your sleep. And remember, it’s not just in tea and coffee. It’s also in chocolate, energy drinks, and other prepackaged foods and drinks.
2.Causes a Headache
If you have caffeine every day, whether in a pill, energy bar, or cup of coffee, you build up tolerance. Then, without your daily dose, you might get a «rebound» headache. It may be worse if you quit caffeine completely and all at once. You’ll find your head will feel better if you reduce caffeine a little at a time.