Comment on Did People Used to Look Older?parentComments−mensetmanusman4ySorry, meant to post the connections people are researching between vitamin-D deficiency and obesity:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5691711/−eurasiantiger4ySurprise: normal-weight people spend time sunbathing, while obese people do not.This is a great example of why correlation does not imply causation.−mensetmanusman4yNote that there are few ethical ways to prove single variable causation over long times in human studies :)
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Sorry, meant to post the connections people are researching between vitamin-D deficiency and obesity:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5691711/
Surprise: normal-weight people spend time sunbathing, while obese people do not.
This is a great example of why correlation does not imply causation.
Note that there are few ethical ways to prove single variable causation over long times in human studies :)