Caffeine is the world's most widely consumed psychoactive drug, lauded for its energy-boosting and focus-enhancing effects.

Caffeine affects the body in a variety of ways, particularly if you drink a lot. Having too much can cause gastrointestinal ...

This amounts to between one and three cups of Joe. According to FDA guidelines, healthy adults should limit caffeine consumption to 400 milligrams max, which equates to around four cups of coffee.

Caffeine is safe in moderate amounts, but excessive intake, especially from supplements or in children, can pose serious ...

Millions of Americans rely on caffeine to kickstart their day, but how much is too much when it comes to coffee?

However, later studies from the found that neither coffee nor caffeine intake appear to cause osteoporosis — and even if they did, osteoporosis may not necessarily affect your height.

Caffeine is the most widely consumed drug in the world, with coffee representing a major source of intake. In my earlier book, Wonder Drugs, I did not include caffeine. Back then, in the 1980s ...