Vit d is 17, what else do I need?

[confusednorthner]

Gp has rung and confirmed my vit d is low at 17.3 and has put me on 20'000iu a day for two weeks then over counter dose. What else should I add to help please? I've read magnesium and K2? No idea what K2 is and how much?
Any advice gratefully received as I'm feeling old and knackered!

[Neverenoughspoons]

When mine was tested at 12, the consultant told my GP 20,000iu a day for a fortnight then 20,000 once a week. When it was retested recently it was just above the lower limit of normal, so I was told to carry on with the 20,000 once a week. GP also said to get at least 20 mins of sun per day from I think April to Sept with bare arms. I think she also said to take it with food to help it be absorbed.

[Gooseygoosey12345]

The best thing is sun. Including normal day light. Try and get outside as much as possible