What this test shows
Measuring vitamin D levels gives an insight into dietary insufficiencies and overall health. Vitamin D2 (25-hydroxyvitamin) is the synthetic form of vitamin D (ergocalciferol). Vitamin D3 (25-hydroxyvitamin D3) is cholecalciferol and is naturally found in food and activated in the body upon sun exposure. Total vitamin D (measured as 25-OH-D) generally refers to both forms, which are both measured in this test.
Who this test is for
The likelihood of vitamin D deficiency is increased in malabsorption syndromes including leaky gut; aging (elderly individuals have a reduced capacity for vitamin D3 formation); darker skin (higher concentrations of melanin reduce efficiency in vitamin D3 production); obesity (fat-soluble vitamin D is stored in adipose, which reduces bioavailability); and minimal sun exposure, such as in winter or at more northern latitudes.
Sample type: Blood – you will need to arrange to attend one of our phlebotomy clinics to get a blood draw; click here to find your nearest clinic, surgery or hospital offering this service.
Turnaround time: 14 days