You are speaking nonsense and lies, considering anyone can get themselves tested. Visiting a doctor is not needed for it.
Doctors are in fact notoriously bad when it comes to vitamin D. None of the docs that I have ever visited eagerly tested my level. I always had to beg for a test. Moreover, none of them ever helped me optimize my level. It is tragically dangerous and harmful to rely on them for it.
What conflict of interest would that be? I'm getting paid by big doctor to tell adtech devs with unchecked egos to go ask someone who has actually dedicated 10+ years of their life to study and practice medicine?
> Doctors are in fact notoriously bad when it comes to vitamin D.
Most doctors know nothing about the endocrine system, at all. I self taught myself through "Endocrinology: Adult and Pediatric" and I probably know more than 99% of general practitioners out there. Heck, most doctors are likely unaware of the endocrinological functions of D3.
On Endocrinology: Adult and Pediatric, I consider it a must read for anyone btw