In short, the method involves
1. A scalp massage nightly with oil
2. Turning your head upside down afterwards for upto 4 minutes
The result is supposed to a gain of anywhere between a quarter to an inch of hair length.
1. Inversion method says: Scalp massage can stimulate regrowth of hair
Research says : This has not been seen in human studies but in rats, massage is thought to help hair regrow - not at a faster rate but just simply regrow - read the full study analysis here
2. Inversion method says: Turning the head upside down should increase blood flow to the head which the author theorises will be helpful to hair growth
Research says: Turning your head upside will change the blood flow and pressure, partly the reason why the inversion method can be dangerous for those with blood pressure problems, pregnant or with glaucoma. In mice again, it has been shown that if you block development of blood vessels, hair growth will decrease so there is some relation to blood vessels and hair growth- (J Clin Invest, pp 409-417)
My view: I think if you are fit and healthy, sure you can try it, there is no real harm. On balance, this method is certainly a lot better than a product promising you hair growth. I do, however, think it is a faddy thing, your hair will grow regardless. Anyone here planning to turn their head upside down?
Here are the do's and don'ts by the author of the inversion method.