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>For me, that means topping up with a supplement. The UK government advises everyone in the country to take a 10-microgram vitamin D supplement over autumn and winter

My last blood test showed I was slightly deficient in vitamin D - my doctor recommended a 50 microgram (2000 IU) supplement. My next test to see how well it' working isn't for a few more months.

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Get a metabolic test as well to check your calcium levels since D can increase serum calcium if you have genetics like mine.

It's frequently suggested that you take vitamin K2 with vitamin D, which helps direct calcium to the bones.

Yes, Salmon is also high in K2, but for me the calcitonin was more important. My D levels and calcium levels are great now.

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