Vitamin D (25 OH) Blood Test

Check your vitamin D level at home with our easy finger-prick blood test kit. Vitamin D is vital for strong bones, a healthy immune system, and regulating mood.

Is it for you?

Do you often feel tired and rundown, lack energy, or have muscle aches and pains? Perhaps you spend little time outdoors, have dark skin (which makes it harder for you to make vitamin D from sunlight), or are over 65 — all of which can make you more prone to vitamin D deficiency.

Our vitamin D test can check if you have a low vitamin D level, which could be contributing to symptoms like fatigue and frequent colds.

Vitamin D (Biomarker)

Despite its name, vitamin D is actually a hormone that’s produced by your skin when it’s exposed to sunshine. Before your body can use vitamin D produced by sun exposure (known as vitamin D3), it must be converted into another form called 25 hydroxycholecalciferol (25 OH). Vitamin D (25 OH) is the major circulating form of vitamin D, and so your vitamin D (25 OH) level is considered the most accurate indicator of vitamin D supply to your body.

• Collect your own finger-prick blood sample at Home Test Kit

Vitamin D is essential for healthy bones and teeth, as it helps your body absorb calcium. It also plays a role in muscle health, immune function, and mental health.

Low vitamin D symptoms include muscle weakness, mood swings, and fatigue. Many people in the UK have low vitamin D levels, and people with dark skin and people who don’t spend much time outdoors are particularly at risk.

Small amounts of vitamin D can be obtained from food, especially oily fish, eggs, and vitamin-D fortified foods. But if you have a vitamin D deficiency, you’re unlikely to be able to improve your levels by food alone.