Frequently bought with this test
Vitamin D (25-OH)
Do you often feel tired, rundown, or struggle with muscle aches and pains? You could be low in vitamin D, especially if you spend little time outdoors, have darker skin, or are over 65 - all factors that reduce your body’s natural ability to produce it. Vitamin D is essential not only for bone health and immune support but also for regulating blood sugar and insulin sensitivity, making it an important marker in the prevention and management of type 2 diabetes. Our Vitamin D Blood Test helps identify deficiencies that may be behind symptoms like fatigue, frequent illness, or blood sugar imbalances - giving you the insights you need to take control of your health.
5/5
£39
1 BIOMARKERS
Frequently bought with this test
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What's in the test
What we measure:
- Vitamin D - Although it’s called a vitamin, vitamin D functions more like a hormone - made in the skin when exposed to sunlight. To be useful in the body, it must be converted into a form called 25-hydroxyvitamin D (25 OH), which is what this test measures. This is the most reliable way to assess how much vitamin D your body has available. Beyond supporting bone strength and calcium absorption, vitamin D also contributes to muscle performance, immune defence, mood stability, and even blood sugar regulation. Deficiency is especially common in the UK, particularly among those with darker skin or who spend limited time outdoors. Symptoms like low energy, muscle aches, weakened immunity, and mood changes may be signs your levels are too low. While foods like oily fish and fortified products offer small amounts, they're rarely enough to correct a deficiency - making testing a valuable first step toward better health.