K2 is supposed to be with D3, but I don't think that was noted here. That's considering the calcification of the pineal gland, of which is due to how nasty things are.
Discussion
Supplementing Vitamin D comes with hidden costs. Stick with raw sunlight.
What you're trying to do is use a fallacy, specifically, bad company fallacy. Is it just because I hadn't mentioned that they need to be good quality supplements, and that there aren't areas where sunlight is easily attainable, especially in the north of some countries?
You’re saying I’m using a guilt by association fallacy?
Regardless of quality or region, I believe Vit D supplements are extremely rarely justifiable because of the biological downsides I shared.