This powerful stimulant may boost workout performance, strength, and vitality. Caffeine's better performance may lead to muscle growth.

Caffeine is one of, if not, the most used natural stimulatory supplement. I'll discuss everything you need to know about caffeine.

I'll explore the current research on combining caffeine and creatine and if it is a good idea or not, I'll also explain any benefits.

Caffeine is a stimulant, while l-theanine promotes sleep and relaxation. So how does the combination improve workouts?