higher strength Rogaine formulas better
than lower strength ones?
To a degree, Rogaine response is dosage dependent.
For example, 5% Rogaine (minoxidil) generally grows
more hair than 2%. But you can also apply 2% more liberally,
or more frequently, and deliver a comparable daily
dosage of minoxidil. While more minoxidil sometimes
helps, beyond a certain threshold, additional minoxidil
makes little if any difference.