I will also note that those with autoimmune issues require higher amounts of Vitamin D as this has a therapeutic action in managing the overactive part of their immune system. Different labs & services will use different recording methods so my advice is to only compare results from the same service to ensure accuracy. This will depend on the individual but I am always looking for a blood result in the region of 80-110mmol/l. OPTIMAL LEVELS - all following levels & advice on dosages are for adults, if you have questions with regards to infants/children please do be in touch But never fear I've broken all of this down for you in the following simple sections. No Vitamin D is truly integral for many elements of our health & wellbeing but working out how much we need, how we get this if we don't live at the Equator, & which supplements are superior to others can get a little on the confusing side. And not just because the best way to top up your levels is to leap about on a summer's day in a bikini. If I had to pick a favourite micronutrient maybe, just maybe, this would be my choice.

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