In short, yes…but it’s a little more complex than that.
Caffeine is one of those supplements which gets a bad rap from some, and is praised as a saviour by others. The truth is, it’s different for everyone. Some people react well to caffeine, it perks them up, helps them focus. Other people, not so much, they get nervous headaches, shakes and all sorts of unpleasant side effects.
So, if you’ve ever wondered whether it’s safe to take caffeine tablets or caffeine supplements, rest assured that it is, as long as you’re responsible. Should you take caffeine tablets? That depends.
What does caffeine do?
Caffeine works by mimicking a chemical called adenosine. Throughout the day, adenosine builds up in your brain and when it reaches a certain point, you get sleepy. Caffeine binds to the adenosine receptors in your brain, and stops them from processing actual adenosine. As a result, you delay that sleepy feeling.
That doesn’t mean you can go on forever without sleep. Eventually, you’ll develop a resistance to caffeine. That’s why people who drink a lot of coffee, tend to really, really drink a lot of coffee, and why tapering their caffeine intake can be such a miserable experience.