Caffeine has a variety of stimulating effects on the body. While healthcare professionals don’t recommend drinking caffeine if you have certain medication conditions, it may be OK to have in ...

Caffeine is classified as a drug because it stimulates the central nervous system, raising alertness. Caffeine is popular because of the temporary energy and mood boost it offers. Before caffeine is ...

Caffeine increases brain activity, focus, and cognition while countering exhaustion. Common signs of a caffeine crash include headaches, tiredness, difficulty concentrating, and irritability. This can ...

Because caffeine is water and fat soluble, it’s able to exert its affects on many parts of the body. andrew crotty/ Shutterstock It’s recommended that adults consume no more than 400mg of caffeine a ...