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Vitamin D deficiency is common worldwide. A person can check their vitamin D levels themselves with an at-home vitamin D test, and many of these tests are of the same quality as those that medical professionals use.

This article discusses how at-home vitamin D tests work, how reliable they are, and lists a range of products to consider. It will also look at when a person might consider getting medical advice on vitamin D deficiency.

Vitamin D is a fat-soluble vitamin that the body needs to carry out vital functions, such as maintaining bones and teeth and helping the immune system fight bacteria and viruses.

According to a 2021 overview of vitamin D deficiency, around 1 billion people worldwide have a vitamin D deficiency, and 50% of the population has vitamin D insufficiency.

Although the article also states that most people with a vitamin D deficiency will not experience symptoms, some people do.

Doctors measure vitamin D deficiencies in nanomoles per liter (nmol/l) or nanograms per milliliter (ng/ml). The current staging is as follows:

  • Deficiency: 30 nmol/l, or 12 ng/ml or below
  • Inadequate levels: 30-50 nmol/l, or 12-20 ng/ml
  • Adequate levels: 50-125 nmol/l, or 20-50 ng/ml
  • High levels: 125 nmol/l, or 50 ng/ml or above

Vitamin D tests involve taking a blood sample. There are two forms of vitamin D in the blood, 25-hydroxy vitamin D (25-OH D), or calcidiol, and 1,25-dihydroxy vitamin D, or calcitriol.

Tests will measure the amount of 25-hydroxy vitamin D in the blood.

This is because 25-hydroxy vitamin D is a better indicator of a person’s vitamin D levels and stays in the bloodstream for longer, making it easier to detect.

If a person has a vitamin D test at a doctor’s office, the doctor will take a small blood sample from their arm using a needle. If a person takes a test at home, they will take a blood sample using a finger prick test.

Samples from at-home tests go through the same lab processing as samples taken by medical professionals in a doctor’s office or clinic. Validation of at-home tests involves the same process as traditional testing that takes place in labs and clinics.

However, a person taking a test at home must follow all of the test manufacturer’s instructions to avoid invalidating the results.

A person can check whether the lab that processes their chosen test has accreditation from the College of American Pathologists (CAP) and certification from the Clinical Laboratory Improvement Amendments (CLIA). A person can also check if the lab’s manufacturing facilities have International Organization for Standardization (ISO) certification.

Below are four at-home vitamin D tests available to purchase online.

Please note that the writer of this article has not tried these products. All information presented is purely research-based.

LetsGetChecked Vitamin D Test

LetsGetChecked offers various at-home test kits and ships to the United States, United Kingdom, Ireland, and Canada.

The LetsGetChecked Vitamin D test involves taking a finger-prick blood sample.

Once a person receives their test kit, they will need to activate it by answering a series of health questions on their personal dashboard, which they can access through the LetsGetChecked website or app.

The LetsGetChecked website advises people to collect their samples before 10.00 a.m. from Monday to Thursday and return them on the same day of collection to avoid samples clotting during transit to the lab.

LetsGetChecked state that they offer 24/7 medical support for customers. A person may get a call from the LetsGetChecked nursing team for positive or out-of-range results.

A person can access their results through their secure LetsGetChecked online account.

Learn more about LetsGetChecked here.

Everlywell Vitamin D Test

Everlywell is an online company that offers a variety of at-home test kits and ships within the U.S.

An Everlywell vitamin D test involves a person taking a finger-prick blood sample. Results will show whether a person’s vitamin D levels are elevated, adequate, or suboptimal.

A person needs to create an Everlywell account to register their test kits and check their results.

A doctor within the user’s state reviews and approves the person’s test and provides a personalized report with resources and health insights.

A person can also attend a live group webinar to get more information about their results and ask questions.

Learn more about Everlywell here.

imaware’s Easy At-Home Screening for Vitamin D Deficiency

imaware offers a wide range of tests and ships to all states except New York. The company states that their test is only for people aged 18 years and over.

The imaware vitamin D test results will show if a person is within a healthy range for vitamin D or if they have low vitamin D levels.

A person can activate their kit and access their results through their patient portal on the imaware website.

The company states that the initial analysis of a person’s sample takes place at a laboratory, and then a doctor reviews them before a person can access them.

imaware claims that results will be available within 7 days of analyzing the sample.

The company advises that a person returns their sample to the lab on the same day they take it.

myLAB Box At Home Vitamin D Test

myLab Box offers their at-home vitamin D test across all U.S. states except New York.

A person provides a finger-prick blood sample to take the test, and the company claims that a person can get their results within 2–5 days.

In some cases, a person may receive a free consultation with a doctor to discuss their results. If a person’s test indicates they may have a vitamin D deficiency, myLAB Box suggests they share their test results with a doctor to get further advice.

Do you need to fast for a vitamin D test?

A person does not need to fast before taking a blood test to check their vitamin D levels. However, if a person needs to take other tests that require fasting, they can choose to fast, so they only have to take one blood sample.

What if I get unclear results?

Vitamin D test results will be straightforward and indicate a person’s vitamin D level based on a given range. However, a person can consider discussing their results with a doctor if they have problems or questions about their test results.

Some people may be at a higher risk of developing a vitamin D deficiency.

These include people with:

Symptoms that may indicate a vitamin D deficiency include:

People at risk of a vitamin D deficiency or have symptoms of a vitamin D deficiency may wish to consult a doctor for possible monitoring and further tests.

Vitamin D is essential for vital bodily functions, and low vitamin D levels can have widespread effects on the body.

Several at-home vitamin D tests are available online that provide people with a convenient and comfortable way to check their vitamin D levels.

People who are experiencing any vitamin D deficiency symptoms or who receive test results that indicate they may be deficient in vitamin D can consider talking with a doctor for treatment advice.