We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
There are very few valid "studies". What's happening is that people do a "meta-analysis" of hundreds of OTHER studies, looking for any sort of statistical correlation.
Of course, correlation does not indicate causality, but most "journalists" don't understand that, nor do they care. If it's good for a headline, it's "journalism". And of all the things that journalists are especially BAD at, that's statistics.
Most doctors are also bad at statistics. So whenever you read of a medical "study", take it with a grain of salt the size of a wildland salt lick.