Vitamin D & B12 Test

Combined vitamin D and B12 test — the two micronutrients most commonly deficient in Australian adults, affecting energy, immunity, and neurological health.

The Vitamin D & B12 Test targets the two micronutrient deficiencies most commonly responsible for unexplained fatigue, mood changes, and impaired immune function in otherwise healthy Australians. Vitamin D deficiency affects an estimated 23% of Australian adults despite the country's sunny climate. Modern lifestyles — office work, sun avoidance, sunscreen use — have made deficiency common across all demographics. Vitamin D affects bone density, immune resilience, mood, cardiovascular health, and testosterone production. Levels below 50 nmol/L are considered deficient, while optimal levels for disease prevention are increasingly defined as 75-100 nmol/L. Vitamin B12 is essential for nerve function, red blood cell production, DNA synthesis, and energy metabolism. Deficiency causes fatigue, brain fog, tingling and numbness, depression, and megaloblastic anaemia. Those at highest risk include vegetarians and vegans (B12 is found almost exclusively in animal products), people over 50 (reduced absorption with age), and those taking metformin or proton pump inhibitors. This test provides a targeted check for those with specific vitamin concerns without the cost of a broader panel.