I would like to know this myself.  I&#x27;ve tried Finasteride, and it did work, but it did affect me in other ways (very low energy, low libido).  So I stopped using it.  I do recall seeing some actual research on the laser combs, and that they did, in fact, have a measurable effect, but it wasn&#x27;t impressive.  If I can find the laser comb stuff, I&#x27;ll post it.  I did buy one (HairMax), but did not see any results.