Tangential, but we tend to bring up the placebo effect pretty quickly in medical discussions about what works and doesn't but actually a lot of what people say is the result of placebo is just not even placebo but "natural" resorption, that is your body doing the work. Placebo is measurable, it's whether taking a "fake" cure is better than "natural" resorption. For some affections, the effect is surprisingly important for others quite negligible.