Okay, so I am upside down as I am gnipyt this LOL. No seriously, I am so glad that I cam across this thread. I remember that years ago when I used to take a high-intensity aerobics class (okay, so I am dating myself), there was this Italian girl with BEAU-TI-FUL hair and after the class, she would take out a vial of something, apply it to her scalp, bend over from the waist and massage vigorously (to the point where everyone thought she looked nuts) and then go to a corner of the studio and stand on her head/shoulders. One day I got up the nerve to ask her about her little routine and she told me that her hair had fallen out when she was a teen (due to something - I forgot) and her grandmother back in the "old country" told her to do this. (I always attributed inverted posses to the eastern countries/cultures like India, China, the Mid East etc. -- I guess sending blood to your scalp is good old ancient wisdom from around the globe.)
Anyway, I have an inversion board (never took it out of the box because it's so freakin heavy) and one of those head stand helpers that is collecting dust under bed -- after reading your comments and recalling the above, I am gonna dust it off and see what happens.