[mass55th]

"I read that if you take more than 4,000 IU D3 daily, you need to also take K2 so that calcium is used correctly and does build up on arteries. The MK-7 type of D3 is recommended."

I had to stop taking Calcium supplements many years ago because they found out I have a hyper para-thyroid that produces more calcium than my body needs. My calcium levels are always high in my bloodwork. Other than taking out those glands if it gets worse, there's nothing they can do about it.

[TTFX]

My calcium levels are always high in my bloodwork.

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Excess retinol (a type of vitamin a) can cause that. We don’t need to take vitamin a supplements because foods have enough. Some brands of milk and multivitamins have retinol supplements. More info:

Hypercalcemia and vitamin A
https://www.ccjm.org/content/89/2/99.long