![visual of a cup of coffee reflecting a sleepy woman](https://www.sleepcycle.com/wp-content/uploads/2022/09/coffeeprices-2048x1355-1-960x635.jpg)
Why caffeine also makes you sleepy
We all know that caffeine is a stimulant that we’ve come to rely on for a little boost. So why is it that your double shot espresso sometimes has no effect and in some cases, even makes you feel sleepy?
Sleep Science Susanne Lindberg Mikkelsen