ROGAINE AFTER 12 HOURS REDDIT - DOES IT WORK?

Yo dudes, so I'm hopping on using Rogaine. Heard some rumors about it making a difference after just short amount of hours, but that seems kinda crazy, right? Anyone else try this hair growth serum and actually see changes in that time frame? Hit me up with your thoughts. Here's a few things I'm wondering: How much Rogaine do you gotta use? Sho