DOES ROGAINE WORK AFTER 12 HOURS REDDIT

Yo dudes, so I'm trying on using Rogaine. Heard some talk about it making a difference after just 12 hours, but that seems kinda crazy, right? Anyone mch on a blood test else try this magic potion and actually see something in that time frame? Hit me up with your stories. Here's a few things I'm curious: What much Rogaine do you gotta use? Shou