Your response is very logical and makes good points. I agree with you.

In addition may "doctors" - and K. McCormick is a chiropractic "doctor": who has financial gain by selling his own "special" recommended vitamins.

He is not an endocrinologist or even a physician. He has an interest in osteoporosis because he has had many fractures from some medical/personal issue. As he is a runner, it may be that he is too thin and that caused his osteoporosis? Who knows.

He did go to Stanford, though, so he has that going for him...but perhaps he couldn't get into medical school and did Chiropractic as an alternative, many wanna be docs do that as it is a easier route.

Personally: if I needed Vitamin K and Vitamin D or anything else to strengthen my bones, that wasn't prescription based, I would go to a compounding pharmacist. Or like you, just use diet and or vitamins one can find in Walmart's vitamin shelves.

I would use a compounding pharmacist who would consult with a good endocrinologist. That would be a solid medical team if one wanted to self treat.

The problem with vitamins from ANY place is that they are not FDA approved in most cases and they are questionable as to quality, especially from some foreign countries who profit from copying, but not quite having good quality control or legal standards for supplements?