Well, yeah.
Caffeine is a super diuretic.
I love coffee but I got to go a lot after.
I also thought caffeine was a diuretic, but it doesn’t actually dehydrate a person from what I’ve read. However, it is a bladder irritant and can make one feel as though he needs to visit a bathroom quickly and often until the irritation passes. Other irritants are artificial sweeteners, fruit juices and even tomatoes.