Why do coffee drinkers feel more clear headed after consuming caffeine? Why do some get a headache without it? Does caffeine cause any permanent brain changes and can the brain go back to ‘normal’ after years of caffeine use?

Question

Why do coffee drinkers feel more clear headed after consuming caffeine? Why do some get a headache without it? Does caffeine cause any permanent brain changes and can the brain go back to ‘normal’ after years of caffeine use?

In: Biology

Answer 1

One of the other elements that’s worth thinking about is dehydration. Most people don’t drink enough water, but some of them do drink enough coffee to prevent dehydration. If you stop drinking coffee and don’t replace it with a different drink, you’ll become dehydrated and that will give you a headache.