I ran across something interesting while researching natural solutions to dandruff. Dandruff is actually caused by a fungus. One of the solutions proposed was to use the feminine predict to control yeast (yeast is a fungus) called monistat ( I can't remember the active ingredient in it right now)
Anyways, a side effect of the active ingredient in monistat is that it stimulates hair follicles to grow hair.
You can Google for all this information., And to read what people say. Monistat generic is $4 over the counter at Walmart.
JFYI
I'm a huge believer that there are tons of natural remedies available to people, but that big pharma squashes them. While monistat is a pharmaceutical, it makes sense that, at $4 a tube, big pharma isn't going to fund a huge study to see if it works. There are other options for hair is that are way more expensive.
Good luck with it all.