One way to look at it is that health tips are subjective: they may be useful depending on the person and their lifestyle. Another way to look at it is that, if

One way to look at it is that health tips are subjective: they may be useful depending on the person and their lifestyle. Another way to look at it is that, if we try hard enough, science will offer explanations that take into account all of these differences. But it might be really hard, like multi-billion dollar studies to reach basic conclusions.