Vitamin D is more than just the “sunshine vitamin.” It plays an essential role in calcium absorption, bone strength, immune regulation, inflammation control, and even emotional wellbeing. Low levels have been linked to increased risk of infections, poor mood, fatigue, and long-term bone loss. Despite its importance, Vitamin D deficiency is one of the most widespread nutritional gaps globally — affecting people in all climates and lifestyles.

Whether you spend most of your time indoors, live in a region with limited sunlight, have darker skin, follow a vegan or dairy-free diet, or simply want to optimize your health, knowing your Vitamin D status is the first step.

Our Vitamin D Test offers a fast, convenient, and scientifically validated way to measure your body’s Vitamin D stores using a small finger-prick blood sample collected at home. The test measures 25-hydroxyvitamin D [25(OH)D], the clinically recognised marker for Vitamin D status, and is analyzed using liquid chromatography–mass spectrometry (LC-MS/MS) for gold-standard accuracy.

• Vitamin D supports bone strength, muscle function, immunity, and mental wellbeing. It regulates calcium absorption, reduces inflammation, and plays a protective role in immune defense and chronic disease prevention.
• Deficiency is common, even in sunny regions — especially if you have darker skin, limited outdoor time, wear sunscreen daily, or follow a plant-based or dairy-free diet.
• Low levels are linked to fatigue, poor mood, frequent illness, and brittle bones. Testing gives clarity on whether your intake (from sun, food, or supplements) is sufficient.
• Vitamin D Plus goes further by measuring your Vitamin D Metabolite Ratio (VMR), which tells you how well your body is metabolising and activating Vitamin D. This deeper insight helps identify inefficiencies or overactive conversion that basic Vitamin D tests can’t detect.
• Testing empowers smarter decisions about your health — helping you adjust your supplement regimen, track your progress, and personalize your approach for long-term wellness.

• Sunlight: 10–30 minutes several times per week
• Food sources: fatty fish (salmon, sardines), fortified milks, cereals, eggs
• Supplementation: D3 (cholecalciferol) is most effective; daily needs often range from 600–1000 IU

A healthy Vitamin D level is considered to be between 30–50 ng/mL, with the broader clinical reference range spanning 20–80 ng/mL. Levels within the optimal range are associated with improved calcium absorption, stronger bones, better immune function, and reduced risk of chronic illness.

When Vitamin D levels drop below 30 ng/mL, the body may struggle to maintain bone density, modulate immune responses, or regulate inflammation. In contrast, excessively high levels (typically above 80–100 ng/mL) may lead to toxicity, particularly when driven by over-supplementation.

The Vitamin D Plus Test also evaluates your Vitamin D Metabolite Ratio (VMR) — a key marker of how efficiently your body is processing Vitamin D. A VMR between 4.3%–14.4% indicates optimal metabolism. Values outside this range may suggest poor activation or excessive breakdown of Vitamin D, guiding more personalized interventions.

• Holick et al. (2011): Established 30–50 ng/mL as the optimal serum range to support bone health and immune function.
• Pludowski et al. (2013): Recommended population-wide Vitamin D screening, especially for those at risk of deficiency.
• Shieh et al. (2017): Identified the clinical value of metabolite ratio testing (VMR) in assessing individual Vitamin D metabolism.
• Lips et al. (2019): Linked suboptimal Vitamin D levels to increased risk of fractures, infections, and inflammatory disease.

These studies support the role of Vitamin D testing in both identifying deficiency and optimising function — especially when combined with metabolic insights provided by advanced tests like Vitamin D Plus.

• Strengthen Bone and Muscle Health: Vitamin D supports calcium absorption and is essential for maintaining bone density and muscle function.
• Boost Immune Defense: Plays a critical role in regulating immune responses and reducing inflammation.
• Personalise Supplementation: See if your current routine (sun exposure, diet, or supplements) is effectively supporting your levels.
• Measure Metabolism with Vitamin D Plus: Go beyond basic testing — assess how well your body converts and utilises Vitamin D with the Vitamin D Metabolite Ratio (VMR).
• Track Progress Over Time: Recheck levels every 3–6 months to confirm your efforts are working — especially when making dietary or supplement changes.
• Easy At-Home Collection: No clinic visit required — a simple finger-prick blood sample is all it takes.
• Peace of Mind: Make confident, informed decisions about your immune, bone, and metabolic health with clinically validated data.

• 25-hydroxyvitamin D [25(OH)D]: This is the main circulating form of Vitamin D and the most accurate indicator of your overall Vitamin D status.
• Vitamin D Metabolite Ratio (VMR) (Vitamin D Plus only): This advanced biomarker measures how efficiently your body is converting Vitamin D into its active forms. It provides insight into your metabolic processing, not just your total levels. VMR is calculated as the ratio of 24,25(OH)₂D₃ to 25(OH)D₃

• Individuals with limited sun exposure or darker skin
• People experiencing fatigue, low mood, or frequent illness
• Those following vegan, dairy-free, or low-fat diets
• Adults supplementing with Vitamin D and seeking confirmation of effectiveness
• Healthcare professionals monitoring bone health, immune resilience, or Vitamin D metabolism

• Dried blood spot (DBS) collection card
• Lancets, alcohol swab, gauze, bandage
• Prepaid return envelope and instructions
• Accredited lab analysis + secure online results