Does anybody have any good links to impressively strong placebo effects of any treatment? Or is it always just a slight reduction in reported pain? These debat

Does anybody have any good links to impressively strong placebo effects of any treatment? Or is it always just a slight reduction in reported pain? These debates always devolve into how placebo is a proven effect and doctors should prescribe placebos. Placebos seem to have limited effects though (they're not going to cure cancer or a cold) so this feels like a red herring.