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Might be worth checking your blood level. $17.46 to do so at home seems reasonable.

https://altruan.com/products/all-test-vitamin-d-test-kit-rap...

The test will probably be useless, it will only show that op has enough vitamin D in their blood

>... it will only show that op has enough vitamin D in their blood

How can you know the result if you haven't tested?

I can’t obviously. But if they don’t have enough, despite massive overdosing for years, that would be very surprising. (The test only shows one of three possible outcomes. It is not a quantitative procedure.)

Concur: that would be surprising. I was more focused on the possibility of having a dangerously high blood level which is fraught with negative sequelae.

This test — among many others — offer quantitative results at home:

https://empowerdxlab.com/products/product/VITD?gad_source=1&...

Pretty expensive though. Lab costs in Germany are <20 € for a quantitative test and the cost of the physician for taking the sample is usually covered by insurance.

Obviously I do that. Also take appropriate amounts of K2.

>Obviously I do that

It wasn't obvious to me.

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