Without any growth aids, I get 0.5 inch a month. With vitamin A capsules diluted with oil on scalp, I get 0.8 inch. Now with MN (miconazole nitrate, cheap brand), I get a lot more, but don't have the exact number yet.
I've been doing this vitamin A thing for the past 6 months and went from ear to just past shoulder. I learned on a hair board from my country, where a lot of ladies and gents were getting 1.2-1.6 inch a month.
I've bought biotin and MSM from what I've learned on the english hair boards, but the pills are so big I don't like to take them. Plus I worry about my liver/kidney, I have a healthy diet, I don't think I need them. It's really unconfortable to swallow them for me, choked a few times...LOL. I threw out the bottles. =/
My hair doesn't like protein so I don't think I'll try megatek, and the sulphur one (MTG I think) was reported to be smelly.
I might try next castor oil too.