Vitamin D (25-OH)

Always Tired or Achy? You Might Be Low on Vitamin D.

Vitamin D is essential for strong bones, teeth, and muscles, but many people in the UK don’t get enough — especially during the darker months. This simple test helps you find out if you’re deficient, so you can take action to feel your best.

What this test includes:

This test measures your blood levels of Vitamin D (25-hydroxyvitamin D), which is crucial for:

• Calcium and phosphate absorption – key for healthy bones and teeth
• Muscle function and strength
• Immune system support
• Mood regulation and energy levels

Why get tested?

Up to 1 in 4 people in the UK are low in Vitamin D by the end of winter, due to limited sun exposure. You may be at higher risk if you:

• Spend most of your time indoors
• Have darker skin (which produces less vitamin D from sunlight)
• Wear clothing that covers most of your skin
• Use sunscreen frequently (which blocks vitamin D production)
• Are pregnant or breastfeeding
• Are over 65

Symptoms of low Vitamin D can include:

• Fatigue and low mood
• Bone pain or muscle aches
• Frequent illness or infections
• Poor concentration or brain fog

Knowing your Vitamin D level helps you decide whether you need to boost it through diet, supplements, or lifestyle changes — before it leads to long-term health problems.