Gut bacteria and vitamin D: What is the link?

This seems very similar to what I have posted on Vitamin A and its metabolism.

The paper suggests that gut bacteria may play a vital role in converting inactive vitamin D into its active, health-promoting form.

The crucial factor may be how the vitamin is metabolized rather than how much of it is stored.**

Everything is connected inside our bodies, and once a thing gets out of balance, other things tend to get out of balance. Kind of a domino -effect and i guess that’s PFS