My friend with ME/CFS said it worked for her. I should have made that more clear. It's her life/body, not mine. Sorry. And it wasn't used in isolation; she's had to make a lot of lifestyle/diet changes too. She's been ill since her teens (over 20 years), but she's managed to make a partial recovery, fingers crossed, and actually achieve a few things during the last few years. I'm still sceptical (I don't know if it really worked for her or definitely think it really worked for her; I'm just taking her word for it), but not the extent of getting into an argument (not that we ever argue) about it.