Re: Who takes what vitamins?

A_n_E

LBN

it doesn't matter if there's 1 study or a thousand, both would hold the same weight.

Eh? Larger studies with more people etc will increase the quality of data.

By your reckoning 1 study of 1 person over a week has the same value as 10 different studies of 100000 people over a decade.

That's just silly.

So about this red meat things that you're so keen to ignore.

Come on man, this is basics.
You only need a large enough sample size to achieve statistical significance to show the correlation is not by chance alone, anything above that adds very little weight other than a narrower interval. If a study does not achieve statistical significance you can pool multiple studies of the same kind together to achieve this, a meta analysis.

You have a dilemma

Veganism causes a 31% increase in bone fractures and 100% increase in depression

Or

Correlation does not imply causation.