ROGAINE AFTER 12 HOURS REDDIT - DOES IT WORK?

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