Tuli Health - Vitamin D Test


Vitamin D Test

What Is Vitamin D?

Vitamin D is a fat-soluble vitamin that regulates calcium and phosphate homeostasis and is therefore vital for musculoskeletal health. Vitamin D circulates in the blood as both vitamin D3 (colecalciferol) and vitamin D2 (ergocalciferol). In the UK, 80–90% of vitamin D is derived from skin exposure to ultraviolet B radiation from sunlight, with the remaining 10–20% being derived from dietary sources.

What are the common reasons to check Vitamin D level?

  • To see if someone has vitamin D deficiency needing vitamin D replacement therapy as part of a health check or as part of an investigation of symptoms which may be caused by vitamin D deficiency or insufficiency.
  • To check if the response of the current or past Vitamin D replacement therapy is adequate.

Who are at risk for Vitamin D Deficiency?

  • Aged 65 years and over.
  • Who have low or no exposure to the sun, for example those who cover their skin; who are housebound or confined indoors for long periods.
  • Who have darker skin pigmentation.
  • With a malabsorption disorder, or following weight loss surgery.
  • With severe liver or end-stage chronic kidney disease.
  • Taking certain drugs.
  • Who is pregnant or breastfeeding.
  • With obesity.

What are the symptoms of Vitamin D deficiency?

  • Chronic exhaustion
  • Feeling tired all the time
  • Depression
  • Hair loss
  • Muscle pain
  • Bone and lower back pain
  • Recurrent infections

What are the complications of vitamin D deficiency?

  • Osteomalacia (marked softening of the bones) — may present with lower back pain, bone pain in the shoulder, ribs, pelvis, or legs; muscle pain and weakness; waddling gait; and impaired physical function.
  • Osteoporosis (thinning of the bones)
  • Falls and fragility fracture.

How is the test carried out?

  • Our vitamin D blood test requires a small blood sample
  • Your finger-prick test kit will have everything you need and makes checking your vitamin D levels private, fast, affordable, and convenient.
  • All you need to do is collect your sample in the morning using our easy-to-follow instructions inside the kit.
  • Make sure you send your sample on the same day you take it.
  • Use the freepost envelope in your kit and send it directly to our accredited laboratory for analysis.

Special Instructions

  • If you’re taking a supplement containing biotin, commonly found in products promoting nail, skin, and hair health. It is recommended that you wait at least 48 hours from your last dose before sample collection.
  • If you’re taking prescribed biotin you should discuss this with your doctor.

How long does it take for my result to come back?

  • Results will be available within 2 working days of receipt of your sample in the laboratory.

What am I expected to see on my lab report about my vitamin D levels?

  • Your report will state if your vitamin D levels fall into normal, insufficiency or deficiency range with the appropriate recommendations written on the report.


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