Effectiveness of Minoxidil Variations?

Doctor Rassman,

I am wondering just how effective a let’s say 15% minoxidil solution is, in comparison to a 5% solution? I believe that 5% minoxidil is 45% more effective than a 2% variant, but are there any scientific reports that can tell us how much more beneficial an increase is beyond that 5%?

I have not seen comparison statistics between the various strengths of minoxidil that show with certainty just how much better the drug is at the higher concentrations, but the benefits and effectiveness is clearly dose related. If someone has that information, please send it in!