There have been scientific studies of the placebo effect by scientists with credentials in the field (as opposed to ignorant talk show hosts or guests looking to generate ratings or to market products), and it has been shown to exist. Do the effects last? Can true "cures" be effected, or is the response more in the area of "feel good"? Does the subject knowing he or she is taking a placebo affect the outcomes, versus those who do not know? Do placebo effects fail when subjects in a blind study are made aware that they have been given placebos? One has to peruse the studies to get specific answers.
Let's remember, though, that copper is non-ferrous, that is, not magnetic! Does it work, even knowing this? I have no clue....
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