Yoga poses that help in reducing hair loss.

Well, there seems to be little evidence to corroborate the claims of a particular asana or exercise being useful in halting the hair loss. As a rule of thumb, everybody would agree that poor blood circulation causes hair loss. Therefore, asanas that increase blood circulation in the scalp area should atleast halt hair loss, if not regrowth. 

An improved blood circulation means, necessary nutrients being supplied to the hair follicle to sustain growth.