Does regaine really help in reducing hair loss and does it cause any harm to the brain?

Minoxidil Works: Minoxidil, the active ingredient in the over-the-counter hair growth medicine Regaine/Rogaine is a potent hair growth stimulator. Hereditary hair loss is due to a gradual miniaturization of hair follicles producing thinner/weaker hair. Minoxidil initiates/prolongs the Anagen/Growth Phase of the follicles, which then produce longer, thicker hair. Must be used 2x/day indefinitely. No brain side f/x.