If you intend to take vitamin d I read in various places you should also take magnesium and probably vitamin k as well. And less calcium. Everything is interconnected.
Historically, I have a couple of basic assault charges, an assault with sexual intent charge, I was charged with two counts of trafficking a controlled drug (later dropped).
Shortly after I commenced taking six capsules a day I started feeling a lot less psychotic.
Casual observation reveals that vitamin D overdose results in hypercalcemia, a condition treatable by vitamin K. Vitamin E overdose results in hemmorrhaging, a condition treatable by vitamin K. There are no known symptoms of vitamin K overdose. Vitamin A overdose (from retinol) can be treated by vitamin E and vitamin K.
Magnesium is balanced with calcium. Sodium is balanced with potassium.
So naturally, I wonder what happens when you supply vitamin K in excess, then determine the overdose amounts for the other fat-soluble vitamins. Once that number is found, reduce the K by steps and repeat, until you have the recommended minimum ratio of K to the other vitamin.