For thinning hair and hair loss problems, minoxidil (like prescription Formula 82M), hands-free laser therapy (LaserCap and others), PRP (Platelet Rich Plasma + BioD or ACell) and nutritionals may be helpful. However, the best method for hair regrowth starts with a comprehensive medical consultation by a specialist, a complete hair & scalp evaluation and a series of measurements (HairCheck) so results can be tracked in the early stages.
Remember, if the number of hair follicles is severely depleted in the area you are trying to treat, you may need a hair transplant to restore coverage.
Alan J. Bauman, M.D.
P.S. For the effective treatment of male pattern hair loss, the only thing I would add to this list would be finasteride to block DHT production, the primary trigger for baldness in men.