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Vitamin D Blood Test
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A Vitamin D Blood Test is used to measure the levels of Vitamin D in your blood. If the test indicates a vitamin D deficiency, medication and supplements are available.
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Vitamin D
Vitamin D is a vitamin that's essential for many functions in your body, including bone and muscle health. Vitamin D can be found in food, supplements, and fortified foods. If you don't get enough vitamin D, you may develop osteoporosis or muscle weakness. An average vitamin D level is 20 to 50 ng/mL. If you have a low vitamin D level, we may recommend that you take a vitamin D supplement or eat foods fortified with vitamin D.
Symptoms of a Vitamin D Deficiency
Vitamin D deficiency is one of the most common deficiencies faced by the UK population. This is due to a lack of sun exposure. As many people work indoors, they fail to reach their minimum vitamin D dosage requirements, which can lead to a whole host of complications and health issues.
If you think you might be deficient in vitamin D, then take our advanced Vitamin D test to find out the very next day. Vitamin D supplements are available in many different forms, including tablets, capsules and liquids. To find our list of vitamin D supplements click here.
Symptoms of a vitamin D deficiency:
- Fatigue and a general feeling of being tired all the time
- Muscle weakness
- Impaired muscle growth (especially among athletes)
- Impaired bone density
- Osteoporosis
- Bone pain
Additional Information
Vitamin D is a vital nutrient that helps the body absorb calcium and phosphorus, which are essential for strong bones and teeth. A lack of vitamin D can lead to bone loss and an increased risk of fractures. Vitamin D also plays an important role in maintaining a healthy immune system.
A vitamin D blood test is a common way to measure how much vitamin D is in your blood. It's used to help diagnose and monitor vitamin D deficiencies. The test measures the level of 25-hydroxyvitamin D (25OHD) in your blood. This is the most accurate measure of your vitamin D levels.
A vitamin D blood test is usually recommended if you have:
- Symptoms of a vitamin D deficiency, such as muscle weakness and pain, low levels of calcium in the blood, or frequent infections
- Dark skin and live in a region with low sunlight exposure year-round
- A medical condition that increases your risk of vitamin D deficiency, such as Crohn's disease or celiac disease
- Been taking medication that can lower your vitamin D levels, such as thiazide diuretics or corticosteroids
Your doctor may also recommend a vitamin D blood test if you're being treated for a vitamin D deficiency. This can help ensure that your treatment is working.
The results of a vitamin D blood test are reported as nanomoles per liter (nmol/L). The normal range is 30 to 74 nmol/L. A level of 20 ng/mL or lower is considered a vitamin D deficiency.
If your vitamin D levels are low, your doctor may recommend taking a supplement or getting more sunlight exposure. They may also recommend further testing to look for other causes of your symptoms.
Vitamin D is an important nutrient that helps keep your bones strong and your immune system healthy. A simple blood test can check your vitamin D levels and help ensure you're getting enough of this important nutrient.
Many people do not get enough vitamin D from their diet, and as a result, may be at risk for deficiency. The best way to ensure adequate vitamin D intake is to get regular exposure to sunlight. However, people who do not have access to sunlight or who have dark skin pigmentation may need to take a supplement to meet their needs. Talk to your doctor about whether you should take a supplement.
Some foods that are high in vitamin D include fatty fish, such as salmon and tuna, fortified milk, orange juice, and cereals. If you are concerned about whether you are getting enough vitamin D, ask your doctor to test your blood level.
Statistics on Vitamin D Deficiency in the UK
Due to the sedentary lifestyle that most Britons lead, with jobs indoors and little activity spent outside, vitamin D deficiency is on the rise. Low vitamin D levels have been linked to illnesses such as cancer. Therefore, it is imperative to check your vitamin D levels and take action if they are on the lower side of the spectrum.
16%
Of adults have a vitamin D deficiency
The UK Governments National Diet and Nutrition survey has found that 1 in 6 adults in the UK have low vitamin D levels, with the number steadily rising. This is in line with our Welzo lab data, with over 25% of tests showing low vitamin D levels.
49%
Of adults are unaware of the UK Governments recommendation to supplement with vitamin D
The UK Government recommends that all adults should supplement with vitamin D. However, close to half of the population is unaware of this advise.
Experts Opinion on Vitamin D Home Tests
"We use this test to check your vitamin D levels to see whether you need to top up or maintain what you’re doing if it's adequate. This test can also be used to ensure your levels aren't too high, as vitamin D can cause toxicity levels on higher intake doses."
Dr Sameer Nakedar
MBBS, MRCGP, PGCert
How to take a Vitamin D Blood Test
Collecting a blood sample for your finger prick home test is straightforward. Watch the video below for more details on how to take a home blood test.
How Welzo Home Tests Work
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Pick your home test
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Take your test
Activate your test and collect your sample in the morning. Return your sample on the same day, using the prepaid shipping label provided. Samples use a simple finger prick collection method that takes around 5 minutes to complete.
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Results within 48 hours
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Vitamin D Blood Test Information
Specification of Vitamin D Blood Test
- Test name: Vitamin D Blood Test
- Also known as & related tests: 25-hydroxyvitamin D blood test, 25(OH)D blood test, calcidiol blood test, and 25-hydroxycholecalciferol blood test
- Biomarkers:
- Test tube: SST (Gold microtainer)
- Brand: Welzo
- Turn around time: Approx. 24 hours
- Lab test ranges:
- Test Kit Marking: MHRA/UKCA
- Location of Lab: United Kingdom
What does a Vitamin D Blood Test for?
A Vitamin D Blood Test tests for the following: .
Are Vitamin D Blood Tests available on the NHS?
The NHS offers Vitamin D Blood Tests subject to eligibility requirements, consultations and local guidelines.
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