So why do people swear by miconazole nitrate (yeast cream)?
I think this is purely experimental. The problem is not many people do proper experiments, nobody measures their hair growth before and after. Nobody considers that hair sometimes grows faster in the summer than the winter. There are too many inconsistencies to make a good judgement.
It is actually normal to have yeast and bacteria on our skin and scalp. I think it is not good to medicate yourself if you are not unwell.
What about birth control?
Actually this is more complicated than it seems, female hormones in women especially estrogens are known to surpress hair growth but increase the growing phase duration and decrease the resting phase (Journal of Investigative Dermatology, 122, 840–842, 2004 ). The effect is different in men. Again, birth control is a medication, use it only as directed.
But what about emu oil, grapeseed oil and even garlic?
These have all been used for treatment of hair loss (mainly alopecia areata) which is very different from just wanting to accelerate hair growth. New growth is usually just regrowth of hair from the follicles.
What about MSM?
There are studies on sheep that show enhanced hair growth. There are also studies on horses which show no difference in otherwise healthy horses. I am yet to come across human studies at all, most reports are from practitioners who say that the supplement may aid in normal growth by ensuring sufficient sulphur supplies (not accelerated growth).
So nothing, really nothing?
Yes…well actually one author had a tongue firmly in cheek suggestion that a head injury could cause increased growth but this is not recommended (The Journal of Cell Biology, Vol. 176, No. 7, 891a,2007 )
So, what is your view on the growth enhancement topic?