[maerF0x0]

IMO the real mistake is assuming that any survey + observational style study constitutes advice for individuals. The unfortunate truth in coaching is there's so little broad advice that can be given, that is guaranteed to not have a slice of humanity for which it's actually damaging. That is, for the vast majority of the advisable ways of living/eating, there are folks out there whom if they adhered to the advice they'd actually deteriorate. Which is a big part of what medical advisors (doctors, nutritionists, integrative medicine et al) exist, and taking advice from an influencer of 1000s or millions of followers is simply irresponsible.

Rather, one needs to first do the science to understand the mechanisms, and 2nd do the labwork to understand the individual.. Then apply the mechanisms which will bring that individual to better health, and iterate too because often times the advice can either go too far, or not far enough.