Caffei
ne is, by far, the most popular psychoactive compound consumed by humans. It exists in significant quantities in some of our favorite foods and beverages, including coffee, tea, chocolate and the soda-related kola nut. We've been downing the stuff since the Stone Age and today the average American adult consumes at least one caffeinated beverage a day. Caffeine isn't a particular dangerous substance, but it's not without its risks. It is a physically addictive stimulant that, when taken in sufficient quantities on a chronic basis, can lead to some pretty nasty health problems. There was a time when I consumed an unhealthy amount of caffeine every day and this led me to a struggle to curb my habit that lasted for two solid years. Here's the basic science and the subjective experience of caffeine addiction.
Read more >