I have been using "Minoxidil Sulfate" for a while now.
It's seems to be the only form of minoxidil that works for me (& I have tried them all).
I did some more reading about Minoxidil sulfate that I found interesting.
I read that regular Minoxidil doesn't work on some individuals because of a lack of a certain naturally produced enzyme on their scalp/skin, & therefore, they will never see any results.
Minoxidil Sulfate takes care of this problem because whether or not the individual has this "enzyme" it will work regardless.
I can't speak for anyone else, but Minox Sulfate has been a God send for me.
I can even see new hairs that are growing well below my normal hairline (about an inch to an inch & a half). So much so, that sometimes I have to pluck them because they are growing too low below my hairline.
But, that could also be because sometimes I'm in a rush and do not properly wash and Minox Sulfate that drips down my forehead.
I should try applying it to the back of my hand as an experiment to see if I grow hair there,lol.
If you google "minoxidil sulfate buy" the 3rd link down id selling minoxidil sulfate powder for between $180-$230 a kilo, so it's not that expensive, but it is typically more expensive than regular minoxidil.
2 major advantages of Minox sulfate is that it is very water soluble, which means it doesn't leave any goopy propylene glycol mess. Also I read the bioavailablity of water based minoxidils are far more superior the propylene glycol based minoxidil topicals.
IDK if I can't post links here, even though it is a link to a clinical study. But, the study says:
"The water-soluble minoxidil composition is formulated by mixing minoxidil with polymers and enhancers. The polymers in the composition maintain the solubility of minoxidil in the water-based formula. The enhancers improve the transdermal efficacy of minoxidil in comparison with that of 5% Rogaine. In FIG. 1, the dorsal skins of rat were treated with various water-soluble minoxidil compositions or 5% Rogaine for 1 hour. The intact or decutinized skins were cut, and homogenized. The permeated minoxidil was extracted and analyzed by HPLC. The results indicated the 2% water-soluble minoxidil composition achieved the same penetrating ability as that of 5% Rogaine. In FIG. 2, the 2% water-soluble minoxidil composition, with or without an enhancer for either a 6-hour or 24-hour period, had a greater transdermal enhancement than that of 5% Rogaine."
If you google the quote above you might find the study that I'm talking about.
Take care.
Rachel