Maybe your habit extends to a cup of coffee in the afternoon, or you have a soda with your dinner.
And maybe as a result, you laid in bed awake later thinking of where you went wrong instead of getting needed sleep.
Rob M. van Dam, a researcher in epidemiology and nutrition from the National University of Singapore, explains when to wisely consume caffeine, what qualifies as too much and what to know about why it affects each of us differently.
This interview has been condensed and edited for clarity.
CNN: How do we know when it’s time to stop