Foam version is nothing but a marketing hype, as they needed to sell something new so people could buy it. Rogaine Foam is simply a hair styling foam rather. You would be better off using some hair styling gel etc. to manage your hair. The true purpose of minoxidil. is for it to reach the roots, not the body of hair. It is the root that needs to be noursihed, like you water the tree, not the trunk. So, start with 5% liquid, and use half the dose. You would be surprised that it would still work fairly, but with minimum to no side effects. If you are starting for the very first time, then I would recommend start slow. Full dose will probably give you side effects and possibly water retention in under your facial skin making it "blotted." In any case, for almost all, that facial side effect should go away: do not underestimate your body-it adjusts itself effciently to changing tides.