There’s another layer of complication here - the (very well documented) placebo effect
If you THINK a (chemically) useless vitamin is effective it will be (within a narrow ish range)
As well, ‘alternative’ health practices - yoga, tai chi, meditation, et al - are effective. The problem is that the practitioner seldom know what the effective limit is (yoga can help with hypertension but maybe not particular heart disease) and most medical professionals have spent their entire careers studying medicine (springing into action when things go bad) and not health/wholeness
Also, while the article is important, I’m not sure it’s as helpful as it could be - yes people concerned with health are susceptible to snake oil salesmen, just as people concerned with religion or politics or finance or any other human endeavor are
This seems as much a media literacy concern as anything