If you take supplemental vitamin D3, you also need to be mindful of taking extra vitamin K2 and magnesium.
It’s important to increase your vitamin K2 intake when taking high-dose supplemental vitamin D to avoid complications associated with excessive arterial calcification.
Vitamin D improves magnesium absorption; but taking large doses of vitamin D can deplete magnesium, as magnesium is required in the conversion of vitamin D into its active form.
Combined intake of both supplemental magnesium and vitamin K2 has a greater effect on vitamin D levels than either individually.
Remember however that the best way to get vitamin D3 into the body is through sunlight. So with the warmer weather coming, strip down and get out into that sunshine as often as you can throughout the day.