[decimon]

One study states that Northern folks who get a lot of sun in the summer will get enough vitamin D to carry them over the winter.

What I've discovered about this is...confusing. I've read that vitamin D can be stored, by an adult, for four months, with a half-life of eight weeks. In fat cells, that is.

So how much vitamin D is circulating in the blood when obtained from fat stores? Not that much, as far as I can tell.

I know only what I read here and there so your info may be as good as mine.

[Stalwart]

What research I could find surmises that little of the vitamin D stored in fat does not enter the bloodstream during say, weight loss. Rather, the D stored in fat gets excreted in the bile, and is gone.

That’s the theory, anyway, based on study of fat metabolism and tested D levels.