Wim Hof and his breath training seem to correlate with many of the same effects as placebo, meaning he's able to consciously trigger normally autonomic systems

Wim Hof and his breath training seem to correlate with many of the same effects as placebo, meaning he's able to consciously trigger normally autonomic systems in his body that are thought responsible for many of the positive results attributed to placebo. https://www.smithsonianmag.com/science-nature/science-explains-how-iceman-resists-extreme-cold-180969134/ https://www.smithsonianmag.com/science-nature/science-explai... It makes sense that triggering different systems in the body could result in medical benefit. The science of placebo effect is very active, but runs into fundamental issues of neuroscience pretty quickly. Science needs to figure out how brains work before we unlock the secrets of the placebo effect.