Vitamin D3 and K2 levels advised

Vitamin D3 supplementation in the range of 4000 to 10,000 units (100 to 250 µg) needed to generate an optimal 40–60 ng/mL (100 to 150 nmol/L) has been shown to be completely safe when combined with approximately 200 µg vitamin K2

https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-k/

However, this knowledge is still not widespread in the medical community, and obsolete warnings about the risks of vitamin D3 overdoses unfortunately are still commonly circulating.

skip to Vit.K2 discussion

https://youtu.be/V5g9AVqRsjo?t=910

Note: Plant sources provide K1. K2 comes from grass-fed animal fat, or natto.