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In any case, the placebo effect is also there. Personally, I will clearly not buy it without any scientific evidence, but I am all in for it if it can help (and it often helps), could it be via the placebo effect or via some real stuff through these trigger points (the latter having to be proved).

@aboutcoolscinece, quite agree with you on that, no doubt, the qi concept is just one
of which I cannot vouch for