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2 Methods of measuring Vit D blood levels

There are two methods for measuring Vit D blood serum levels, and your Vit D result is measured and given as one or the other i.e. NG or NMOL.

1 ng = 2.5 nmol
2.5 nmol = 1 ng

The printout of your Vit D lab test reveals your total Vit D score and whether it was NG or NMOL.

IU, International Units, refers ONLY to dose/units.

40 scientists recommended that we maintain Vit D blood serum levels at no less than the following range:

40-60 ng and/or 100-150 nmol.

In the following interview, Vit D blood/serum levels are referred to in NG (nano grams per mil). When Dr Holick (a qualified endocrinologist, who’s studied Vit D for 40 yrs) says he maintains his own Vit D level at 55, he means he keeps it at 55 ng, which is EQUAL to approx 138 nmol (1 ng = 2.5 ng). He takes 3000 iu daily, all year. He prescribes 3000-4000 iu daily to his patients on a continuous basis. He says overweight people should take more.

You can take Vit D daily and, if you forget to take it on one day, you can take double the next day. Or, you can take the entire weeks’s dosage on a once weekly basis. It’s your choice.

For better absorption, take Vit D3 with fatty/oily foods such as full fat milk/yoghurt/cheese, coconut oil, olive oil, avocado, etc. It’s also worth considering taking magnesium (and Vit K2 if there are no contra-indications). But that’s for you to decide.


Some further info for those who are interested:


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