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Do you often feel tired, rundown, or struggle with muscle aches and pains?
You may have vitamin D deficiency, especially if you spend little time outdoors, have darker skin, or are over 65 — all factors that can affect your ability to produce vitamin D.
This vitamin D test helps determine if your levels are low, which could be contributing to symptoms like fatigue and frequent illnesses.
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Results estimated within 7-10 working days
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Convenient testing options
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Personalised doctor's report
- Free delivery
What's in the test?
Vitamins
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Vitamin D
Despite its name, vitamin D is actually a hormone produced by your skin when exposed to sunlight. Before your body can use the 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 your vitamin D (25 OH) level is considered the most accurate indicator of vitamin D supply in your body. - 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.
- Symptoms of low vitamin D include muscle weakness, mood swings, and fatigue. Many people in the UK have low vitamin D levels, particularly those with dark skin or those who don’t spend much time outdoors.
- Small amounts of vitamin D can be obtained from food, especially oily fish, eggs, and vitamin D-fortified foods. However, if you have a vitamin D deficiency, improving your levels through food alone may not be sufficient.
How to prepare for your test
Please follow these instructions to ensure accurate results:
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Take your sample at least 24 hours after any vitamin or mineral supplements.
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Do not take biotin supplements for 2 days before your test, and discuss this with your doctor if it is prescribed.