Measuring vitamin D levels and proactively managing them is important, as indicated by Mendelian randomization studies.

“So, the Medallia randomization studies, in addition to the randomized controlled trials, I think another piece of evidence that hints towards possible causation of vitamin D being important for preventing respiratory tract mortality as well.”

“So another way of measuring more of a causative role, you know, of certain factors, and particularly, in this case, lifestyle factors or something that, you know, I call vitamin D lifestyle, because you're making it you know, from the sun, they're called Mendelian randomization studies.”