Vitamin D 25 (OHD)

There is growing evidence that vitamin D is involved in an increasing number of chronic diseases including bone disease, cancer, autoimmune disease, chronic fatigue and mental health problems. Vitamin D has a hormone like effect, which has a high prevalence of deficiency and insufficient even in normal populations.

Vitamin D is made in the skin on exposure to a ‘pinking’ dosage of sunlight. How much is made will depend on age, the size of the area that is exposed to sunlight, and skin tone. Those living in the northern hemisphere are likely to only gain enough sunlight from May to October, however covering skin to prevent sunburn, and the use sunblock with SPF15 or above completely blocks vitamin D production in the skin. Dietary sources of vitamin D are unable to maintain optimal levels throughout the year.

Patients with are at risk of the following should all be routinely tested

  • Cancer of the breast, prostate, colon, and ovary
  • Schizophrenia
  • Low immunity or frequent infections
  • Diabetes mellitus
  • Cardiovascular disease
  • Fibromyalgia
  • Hypertension
  • Polycystic Ovary Syndrome
  • Depression
  • Migraine
  • Osteoporosis / osteopenia
  • Epilepsy
  • Osteoarthritis
  • Autoimmune conditions
  • Multiple sclerosis

It should also be considered for patients with symptoms of musculoskeletal pain and low back pain, muscle weakness, loss of balance, and systemi inflammation.

Once supplementation is implemented, regular blood tests should be conducted to ensure levels remain within the optimal range, as it is possible, although rare, to reach vitamin D toxicity.

What is being measured

A particular form of Vitamin D called 25 (OHD)

Specimen requirements

Skin prick blood sample

Before taking the test

Supplements should be stopped for 48 hours prior to testing unless wishing to monitor therapy.

Turnaround time

10 – 15 days

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Smart Nutrition Vitamin D Test Sample Report

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