Review Of Castor Oil Hair Growth Ideas. It is an oil, so a little goes a long. Web while the average human hair follicle grows just over a centimeter a month, some claim anecdotally that using castor oil once a month can spur growth three to five times the normal rate.

Those who are not pregnant (anecdotal evidence suggests that castor oil can induce pregnancy) and those looking for a treatment to nourish dry strands. Castor oil will not grow hair, says perry romanowski, a cosmetic chemist and the author of beginning cosmetic chemistry. “however, i have patients tell me differently all the.