I only have a very superficial understanding of reiki and other alternative treatments, but I wonder how much of the subjective effects have to do with psycholo

I only have a very superficial understanding of reiki and other alternative treatments, but I wonder how much of the subjective effects have to do with psychological suggestion. I mean, of course the placebo effect is also real, and just getting the feeling that someone is personally and emotionally engaging with you and your issues can sometimes do wonders, and things that just feel good can improve well-being regardless of whether the theory behind them makes any sense. But if some kinds of treatments do appear to have effects beyond placebo or just plain "this feels good" (I don't know if reiki does; my limited understanding is that research doesn't support that), I wouldn't be surprised if it had something to do with suggestion as well. (For example, hypnosis can apparently help with irritable bowel syndrome, and I have a vague recollection that there's even some scientific support for that. So yeah, suggestion can even have an effect on physical symptoms.) Even things like yoga or other exercises where part of the practice may be getting into a certain state of mind probably involve suggestion at least on some level. I could totally see something like reiki producing a higher-than-expected effect of e.g. relaxation in some people, especially those who are more susceptible to suggestion. But that's just a hunch; it might be interesting to know if there's been any research on that.