It could be, for example, that coffee drinkers are more active and social. If you need to cut back on your caffeine consumption, do it slowly over several weeks, gradually adding more decaf to your regular brew.Or it could be that one of the more than 1,000 compounds that coffee naturally contains boosts our health. And don't forget: That big cup of soda and your favorite chocolate bar also contain caffeine.
Plus, caffeine can interact poorly with some common medications, and it can worsen insomnia, anxiety and heartburn.
I understand also that the caffeine content in tea is extracted during the first ten seconds of brewing.
So if you're looking for more of a jolt, don't steep the tea for ages, just use more tea leaves.
Remember: Caffeine is a drug, says Steven Meredith, a researcher in behavioral pharmacology at the Johns Hopkins School of Medicine.
While low to moderate doses are generally safe, caffeine is addictive and users can become dependent on it and find it difficult to quit or even cut back, he says.