Type
Blood Testing
Biomarkers
11
Duration
10 min
Results
3 days
Measures 25-hydroxyvitamin D — the circulating form your body uses for bone health, immune function, mood regulation, and muscle performance. Vitamin D deficiency affects up to 1 in 4 Australian adults despite abundant sunshine, driven by indoor lifestyles, sunscreen use, and darker skin tones. This affordable single-marker test provides the data point that informs whether supplementation is needed and at what dose.
Vitamin D is technically a hormone, not a vitamin, and its receptors are found in virtually every tissue in the body — from bone and muscle to brain and immune cells. The 25-hydroxyvitamin D test measures the storage form that your liver produces from sun exposure or dietary intake, providing the most accurate picture of your vitamin D status. Deficiency (below 50 nmol/L) is associated with increased fracture risk, impaired immune function, seasonal mood disorders, muscle weakness, and higher all-cause mortality. Insufficiency (50-75 nmol/L) is even more common and still associated with suboptimal health outcomes. Optimal levels for longevity are generally considered to be 75-150 nmol/L. Australians are particularly susceptible to deficiency during winter months (May-August), but year-round deficiency is common in office workers, those who cover up for cultural or skin cancer prevention reasons, and people with darker skin. ClearLabs delivers results through their digital dashboard with optimal ranges — not just the broad pathology reference range — helping you understand whether your level is adequate or merely 'not deficient.'
Key Details
- Markers
- 1 (Vitamin D)
- Fasting
- Not required
- Collection fee
- +A$20
Who Is This For?
Vitamin D screening, bone health, immune support, seasonal mood monitoring, supplement dose optimisation
What's Included
Preparation Required
No fasting or preparation required.
Panel Categories
Biomarkers Tested
11A trace mineral essential for iron metabolism, connective tissue formation, and antioxidant defense. The copper/zinc ratio is an emerging marker of inflammation and oxidative stress. Both deficiency and excess can cause problems.
Essential for DNA synthesis, cell division, and red blood cell formation. Folate deficiency causes megaloblastic anemia and, during pregnancy, increases the risk of neural tube defects. Works closely with vitamin B12.
Involved in over 300 enzymatic reactions including energy production, muscle function, and nerve signaling. Magnesium deficiency is common and associated with muscle cramps, anxiety, insomnia, and increased cardiovascular risk.
A trace mineral crucial for thyroid hormone metabolism, antioxidant defense (via selenoproteins), and immune function. Selenium deficiency can impair thyroid function and increase susceptibility to viral infections.
A fat-soluble vitamin essential for vision, immune function, skin health, and cell growth. Both deficiency and excess can cause health problems. Levels are tightly regulated by the liver.
Essential for nerve function, DNA synthesis, and red blood cell formation. B12 deficiency can cause anemia, neuropathy, fatigue, and cognitive impairment. Common in vegans, vegetarians, older adults, and those taking metformin or acid-reducing medications.
A powerful water-soluble antioxidant essential for collagen synthesis, immune function, and iron absorption. Vitamin C deficiency causes scurvy. It also supports wound healing and protects against oxidative stress.
The best indicator of overall vitamin D status. Vitamin D is essential for calcium absorption, bone health, immune function, and mood regulation. Deficiency is extremely common, especially in northern latitudes, and linked to increased disease risk.
A fat-soluble antioxidant that protects cell membranes from oxidative damage. Vitamin E works synergistically with vitamin C and selenium. Deficiency is rare but can cause nerve and muscle damage.
Essential for blood clotting and bone metabolism. Vitamin K activates proteins needed for blood coagulation and calcium regulation in bones. Deficiency increases bleeding risk and may contribute to osteoporosis.
An essential trace mineral involved in immune function, wound healing, DNA synthesis, and testosterone production. Zinc deficiency impairs immune response, delays wound healing, and can cause hair loss and taste changes.
- Category
- Diagnostic
- Sample Type
- Blood (venous draw)
- Duration
- 10 min
- Results
- 3 days