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HomeTests ExplainedVitamin D

BLOOD TEST · SMART CARE POLYCLINIC, DEIRA

Vitamin D explained

Measures your vitamin D level — deficiency is very common in the UAE despite the sunshine.

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SAMPLE
Blood
FASTING
Not needed
INCLUDED IN
9 packages
WHERE
29 Doha Centre, Al Maktoum Rd, Deira

What the Vitamin D test measures

Made in the skin from sunlight and taken in from a few foods. It controls how much calcium the body absorbs, which is why it governs bone strength, and it affects muscle and immune function too. The Endocrine Society sets out how a deficiency is confirmed and corrected1, and guidance written for the UAE specifically addresses who is worth testing here — deficiency is common enough locally to justify it.2

What the result tells you

Why deficiency is common here

Not a shortage of sun but avoidance of it — indoor work, air-conditioned days, covering clothing, sunscreen, and the hottest hours being the ones people stay out of.

The symptoms are vague

Tiredness, aching muscles, low mood, bone or back pain. They overlap with many other things, which is why it is measured rather than guessed at.

It is straightforward to correct

A supplement course, then a recheck rather than an assumption that it worked.

Too much is not harmless

Very high levels from over-supplementing cause problems of their own, which is the other reason for measuring rather than simply taking more.

How to prepare

Fasting
Not needed
Best time
Any time of day

What can move the result

A result outside the usual range does not on its own mean something is wrong. These are the everyday explanations a doctor considers first.

How much direct sunlight reaches your skin
Darker skin, which needs longer exposure for the same amount
Covering clothing and daily sunscreen
Being pregnant or breastfeeding
Conditions affecting absorption from the gut

Frequently asked questions

Made in the skin from sunlight and taken in from a few foods. It controls how much calcium the body absorbs, which is why it governs bone strength, and it affects muscle and immune function too. The Endocrine Society sets out how a deficiency is confirmed and corrected, and guidance written for the UAE specifically addresses who is worth testing here — deficiency is common enough locally to justify it. Why deficiency is common here: Not a shortage of sun but avoidance of it — indoor work, air-conditioned days, covering clothing, sunscreen, and the hottest hours being the ones people stay out of.

Sources

Written from current guidance and reviewed 31 August 2026.

Sources cited above

  1. Holick MF, Binkley NC, Bischoff-Ferrari HA, Gordon CM, Hanley DA, Heaney RP, Murad MH, Weaver CM. Evaluation, treatment, and prevention of vitamin D deficiency: an Endocrine Society clinical practice guideline. The Journal of Clinical Endocrinology and Metabolism. 2011;96(7):1911-30. PMID 21646368. doi:10.1210/jc.2011-0385The Endocrine Society's guideline on correcting a demonstrated vitamin D deficiency, including high-dose repletion regimens.
  2. Haq A, Wimalawansa SJ, Pludowski P, Anouti FA. Clinical practice guidelines for vitamin D in the United Arab Emirates. The Journal of Steroid Biochemistry and Molecular Biology. 2018;175:4-11. PMID 27693095. doi:10.1016/j.jsbmb.2016.09.021Guidance written for the UAE specifically on who should be tested for vitamin D deficiency and how it should be corrected.

Sources are listed for the specific statements they support. They are published research and guidance, not a substitute for a consultation — what applies to you is decided by a doctor who has assessed you.