Dr. Michael Breus

So the back end of caffeine is when you stop caffeine in order to still have successful sleep, which has a lot to do with what we're talking about here because caffeine also messes with some of your sleep cycle.

So caffeine has a half-life of between six and eight hours, right?

So I have people stop at least initially by 2 p.m.

because eight hours later is 10 roughly when most people are going to bed.

So 90 minutes after you wake up, first caffeinated beverage, stop caffeine by 2 p.m.

This is your window for caffeine where it will not have a major effect on your sleep.

So that's what I try to do is give people super duper practical advice because what ends up happening, right, is they think, oh, well, I had a couple of drinks.

That's not a big deal.

It is based on when you had those drinks.

Oh, I had a couple of cups of caffeine.

That's not a big deal.

It's not based on when you have it.

That's why the book is called The Power of When.

She's a super sleeper.

Maybe.

So I'll tell you a funny story.

So the woman that takes care of me, my physician, her name is Dr. Carey.

And Carey

used to have an espresso before bed, literally an espresso before bed.

It's like, Carrie, what are you doing?