There's a key word here, and its "loss". People for the most part want to try and keep their hair, so its "hair loss prevention". The way it comes across is "preventing hair" (to stop the growth of hair)
If "hair loss prevention", easily X,XXX. Without that word "loss", I suggest taking offers...tricky. That doesn't necessarily mean it has no value, but my feeling is less value, than it being "hair loss". Niche buy, IMO