As somebody who is still suffering from minoxidil absorption side effects after being off minoxidil for more than two months... Really, do EVERYTHING you can to prevent minoxidil from entering your blood stream. Unless you'd like to speed up your aging.
Guys, all the derma rolling feedback really seems great. And, guess what, there is a way to increase the effectiveness of it drastically: Retin-A. Retin-A is an extremely strong peeling that goes very deep - deep enough to destroy old collagen and induce new collagen formation. In our case, it would destroy the old, hard and fibrotic collagen in the bald areas, and the body will replace it with fresh, soft collagen. Just like derma rolling, except you can reliably cover bigger areas with Retin-A as opposed to only hitting single spots with the rolling.
Combined with the derma rolling, however, the Retin-A would profit from the "tunnels" the way that minoxidil does, and would be delivered directly into our fibrotic collagen.
Retin-A should prove very effective in actually restoring old hair by dissolving fibrotic collagen in bald areas, when combined with derma rolling as it would be able to go deeper instead of just doing its workings at the skin surface.