Who knows we need to see results first, until I start seeing NW7s getting their juvenile hair back we're still far from a cure.If you don't want to be broke probably, but technically it's not needed, just a way to make it more affordable elongating its duration.
HMI seems like strong enough on itself for curing most cases of hairloss if you could constantly apply it nonstop and cost wasn't a problem
On a slightly different note, I wish studies would start evaluating results on terminal hair growth only across the industry. A lot of the time they just mention hair growth in general, but no-one gives a crap about wispy sub-terminal hair