How effective is inversion therapy for hair loss/blood circulation for the scalp?

Laying upside down will not help with hair growth. Reading about these things on the Internet does not mean it is true.

Whilst having 'inversion therapy', or doing head stands and hand stands during yoga, might temporarily increase scalp blood flow, there is no evidence that I am aware of that this has any beneficial effect on preventing or treating hair loss. 

Thanks for the great question. No, there is no role whatsoever for inversion therapy in helping hair loss.