Yes, the method works, but you need to corrugate and pull your hair a lot. Not just 5 minutes a day. It's not only this then. In the book it explains...
There's an Italian man who invented a gym to regrow the hair. The basic exercise is to to pull your hair in order to detach the scalp from the bone,...
Thank God you can choose what to buy. In my country (Italy) there's no way to find grassfed meat. The Paleo movement is growing, but still not enough...