Just one small correction and I'll shut my mouth.

You can't really eat vitamin D, unless you eat the livers of animals or have it added synthetically to your food. If it is a synthetic vitamin D, it probably isn't the sort readily used by your body. D3 is a scary vitamin to lack since low levels affect your body is so many ways and is associated with lots of scary diseases like heart disease and cancer.

Most people don't get enough sunlight these days. We wear too many clothes and stay indoors too much.

Anyway, welcome to the board and best of luck to you!