You may have heard that science proves saturated fat is good for you —
or, at least, that it's not the devil. That claim is based on a
meta-analysis, a study of studies that reviews a wide variety of
research on a given subject. Meta-analyses are a great way to get a
big-picture view of what science says about a subject and the results of
one of these papers means a lot more than the results of a single
study, on its own.
Trouble is,
this particular meta-analysis has a lot of flaws,
writes James McWilliams at the Pacific Standard. Chief among them: The
authors left out a couple of key studies that came the opposite
conclusion and they misrepresented the results of a third. That doesn't
mean butter IS the devil. But it does mean that you should pause before
declaring this particular paper the final word on what is and isn't
healthy to eat.
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