> That's because it's a marker of frailty, not a direct cause for most of these diseases. Do you actually know that? > In other words, correlation does not im

> That's because it's a marker of frailty, not a direct cause for most of these diseases. Do you actually know that? > In other words, correlation does not imply causation. Sorry, but just because correlation does not imply causation doesn't mean that Vitamin D deficiency isn't a cause.