This is where I was eighteen months ago, although I am hypOthyroid. Below range calcium and absolutely bottom of range Vitamin D. At that time the NHS were not a lot of help, but I have now raised my Vitamin D to acceptable levels (100+) by taking 5,000 iu gelcaps, at first one a day and now a maintenance dose of one three times a week.
When I found myself in this situation, I had been taking a multivitamin with the RDA of D in it every day for 20+ years and I also spend at least an hour outside every day and tan every summer, so exposure to the sun is not necessarily a bad thing.
You should also bear in mind that you want your calcium in your bones, teeth etc, not floating round in your blood, so if it is only slightly below the normal range, it may not actually be a problem. There is notoriously low compliance with calcium supplements because of the side effects, but if you look after the D, your calcium should take care of itself.
Good levels of D on the other hand are essential. Take a look at these guidelines for what to do about deficiency.
www.imperialendo.com/for-doctors/vitamin-d-guidelines
Although knowledge in the NHS is better than it was say two years ago, a lot of doctors do not understand enough to prescribe the levels you need to get straight, so you may have to take matters into your own hands. Vitamin D is fat soluble, so if you are buying supplements, they need to be gelcaps, not tablets.
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