Hasn't the blood flow theory on its own been proven BS though? Most of the studies that showed results with any kind of scalp massage or microneedling were using fin or minoxidil in conjunction with it
Thats only based on the assumption that the cause for hair loss is the same for everyone. For some people its what they need to get their head/scalp the nutrients/minerals and oxygen it needs to grow hair properly again and have the specific enzymes working again.
It might even be just 1 person out of thousands. Still worth trying imo.
Would i call it a cure? Ofcourse not. Doing handstands and massages seems easy enough to incorporate and is free however.