Does coffee really affect your sleep or is it all in people's heads?

its in there head,but wich one

Yes. The caffeine in coffee prevents the action of cyclic adenosine monophosphate phosphodiesterase (cAMP-PDE), which is a chemical that breaks down adrenaline. So the adrenaline is active longer, which keeps you awake.

Wow, its amazing that someone actually asked this question.

Well, I asked because some people said caffeine doesn’t bother them at all and other people says it does. Isn’t Fluther here for that reason? To get others opinions and answers? Don’t reply unless you have an answer!

I didn’t mean any offense. My appoligies. Some people may be more conditioned to the effects of caffine than others who don’t intake much.

Similar to how heroin addicts have to take a hit large enough to kill most people, just to feel a decent high.

And yes, caffine is a drug. Millions of Americans are addicted to it.