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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 which products to consider. It also looks at when a person might consider getting medical advice on vitamin D deficiency.

A quick look at the best at-home vitamin D tests

A vitamin D test determines the vitamin D levels in the bloodstream. This type of test may suit individuals with chronic conditions, such as asthma, psoriasis, or an autoimmune disease.

People can receive vitamin D from sun exposure, supplements, and some types of food.

When a person is out in sunlight, UVB rays convert to vitamin D. This conversion only happens when a person is outside, as UVB rays cannot travel through glass. Additionally, the weather, time of day, and skin melanin content affect how much vitamin D a person gains through the sun.

This process generates the inactive form of vitamin D, 25-hydroxyvitamin D (25-OH D). The liver and kidneys then convert it into its active form, 1,25-dihydroxy vitamin D.

The inactive version of vitamin D, 25-OH D lasts around 14 days in the bloodstream. In contrast, the active version becomes undetectable within a few hours. This is why the majority of vitamin D tests measure the level of 25-OH D in the bloodstream.

Vitamin D from supplements is often in the form of lanolin from sheep or the animal-free alternative lichen. While this vitamin is not plentiful in food, mushrooms are one of the best sources of vitamin D through diet.

Doctors may suggest taking a vitamin D test to monitor bone conditions, especially if a person has symptoms of vitamin D deficiency. These may include:

  • bone weakness
  • bone softness
  • bone malformation
  • fractures

Further, people who have a high risk of developing vitamin D deficiency may also consider buying a vitamin D test. This may include people who have:

MNT chooses at-home tests that meet the following criteria:

  • Laboratories: Where possible, MNT will choose companies that process test samples in CLIA-certified labs. This means they follow state and federal regulations.
  • Budget: MNT chooses at-home tests that suit a wide range of budgets.
  • Privacy: MNT includes companies that offer robust and transparent privacy measures, such as data protection and discreet packaging.
  • Test result speed: MNT selects companies that inform customers when they will receive their test results and whether they will receive them via email, app, or phone.
  • Further support: MNT will indicate whether a company offers further support, such as a follow-up phone consultation with a doctor to discuss test results.

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

Medical News Today follows a strict product selection and vetting process. Learn more here.

Best overall: LetsGetChecked Vitamin D Test

  • Price: $89
  • Collection method: Finger-prick blood sample
  • Results turnaround: 2–5 days
  • Pro: Ships to the United States, United Kingdom, Ireland, and Canada
  • Con: Higher cost than some vitamin D tests

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 day of collection to avoid samples clotting during transit to the lab.

The company states that it offers 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.

In addition to that, the vitamin D test comes with free shipping.

LetsGetChecked does not work with any health insurance companies. However, it claims that its test has a lower price than what a person may get from a medical professional.

A person can pay for the test using their flexible spending account (FSA) or health saving account (HSA) card.

Learn more about LetsGetChecked here.

Best subscription: Everlywell Vitamin D Test

  • Price: $49
  • Collection method: Finger-prick blood sample
  • Results turnaround: Within days
  • Pro: Lower cost than other vitamin D tests
  • Con: Results may take longer than other vitamin D tests

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. The company claims that most test results are available within a few business days of the lab processing the sample.

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.

Further, a person can also enroll in the membership plan and get the test for $24.99 every month. They can cancel this plan without any additional fees.

Everlywell also allows buyers to pay through their FSA and HSA. It states that at-home tests may not require insurance coverage, but it is best to check with the insurance provider directly and ask whether some coverage is available.

Learn more about Everlywell here.

Use code “HEALTHLINE25” for 25% off.

Best for fast results: myLAB Box At Home Vitamin D Test

  • Price: $89
  • Collection method: Finger-prick blood sample
  • Results turnaround: 2–5 days
  • Pro: Results may arrive quicker than other vitamin D tests
  • Con: Higher cost than some vitamin D tests

MyLab Box offers its 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.

The company offers a subscription service for $80.10 for those who wish to take the test every six months.

There is also free 2-day shipping when ordering this test kit.

Individuals can pay with their FSA or HSA cards, but getting insurance coverage for the at-home tests may not be possible.

Learn more about myLAB Box here.

Best low cost: Cerascreen Vitamin D Test

  • Price: $49
  • Collection method: Finger-prick blood sample
  • Results turnaround: Within days
  • Pro: Offers a 30-day refund guarantee, lower cost than other vitamin D tests
  • Con: Not available for people in the states of New York, New Jersey, Rhode Island, or Maryland

Cerascreen’s at-home vitamin D test is available for those who reside in all states apart from New York, New Jersey, Rhode Island, or Maryland.

This test requires a finger-prick blood sample. The company states that people will receive the results of their test within days, alongside recommendations of how much vitamin D supplementation a person may require.

Cerascreen says that a professional, CLIA-certified lab analyzes each test, and a board certified doctor reviews the results.

People can also purchase two packs for $83. Additionally, the company offers free shipping with an average delivery time of 2–5 days.

Cerascreen offers a 30-day refund policy. It does not state whether it accepts FSA or HSA payments.

The table below provides a comparison of the at-home vitamin D tests detailed in the section above:

LetsGetCheckedEverlywellmyLAB BoxCerascreen
Price$89$49$89$49
Membership planunavailableavailable monthly for $24.99; cancellation is available at no extra costavailable every six months for $80.10no information available
Time to receive resultsin 5 dayswithin dayswithin 2–5 dayswithin days
Results consultationavailablea live group webinar is available, as well as a personalized reportfree consultation is available if the result is positiveno information available
FSA and HSA paymentsyesyesyesno information available
Insurance coveragenot possiblecheck with insurance providernot possiblenot possible
Availability to all U.S. statesavailable to all states except New Yorkyesavailable to all states except New Yorkavailable to all states except New York, New Jersey, Rhode Island, or Maryland

Some things a person may consider when looking for an at-home test, include:

  • Cost: Some tests are more cost-effective than others so a person may consider their available budget when choosing a test.
  • Certifications and accreditations: Individuals should check for CAP, CLIA, and ISO certifications.
  • Reviews and reputation: Checking independent reviews from sites such as Trustpilot or the Better Business Bureau (BBB) can help a person make an informed decision about a company’s reputation.

A test measures the vitamin D levels in a blood sample. Here is how it works:

  1. An individual first decides whether to order an online test to do at home or visit a doctor’s office.
  2. At a doctor’s office or lab, the specialist uses a phlebotomist to draw a blood sample from the person’s arm.
  3. At home, a person needs to use the finger prick they receive to collect a small blood sample from their finger and send it to the lab.
  4. At the lab, a scientist measures the 25-OH D levels and submits the results.

Vitamin D tests involve taking a blood sample. There are two forms of vitamin D in the blood: 25-hydroxy vitamin 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.

Learn more about the 25-hydroxy vitamin D test here.

Samples from at-home tests go through the same lab processing as samples taken by medical professionals in a doctor’s office or clinic. The validation process for at-home testing is the same as for traditional testing that takes place in a lab and clinic.

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.

Vitamin D is a fat-soluble vitamin 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 2022 overview of vitamin D deficiency, around 1 billion people worldwide have a vitamin D deficiency, and 50% of the global population has vitamin D insufficiency.

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

Another important thing to consider is the source of vitamin D. Many people believe that sun exposure is the best source for vitamin D. The article even suggests to spend 20 minutes in the sun everyday. However, that can easily bring risks that are may be than slight vitamin D deficiency that one can easily solve with healthy nutritious food and supplementation.

Premature aging and skin cancer are two huge culprits of sun exposure. Moreover, the article mentions that India, Pakistan, Iran, and Bangladesh have higher vitamin D deficiency rates than the U.S. Yet, these countries tend to have longer sunny days and more UV exposure than many places in the U.S.

As such, before deciding to stay more outdoors, a person should definitely prioritize supplementation.

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

These include people with insufficient intake of foods containing vitamin D and malabsorption syndromes, such as Crohn’s disease and celiac disease.

Symptoms that may indicate a vitamin D deficiency include:

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

Below are some frequently asked questions about home vitamin D test kits:

How much does a vitamin D test cost?

Vitamin D tests vary in price depending on the brand a person chooses and the features a product comes with.

A person can also save money and subscribe to a membership plan if they need to get tested every month or every 6 months.

Also, most companies do not accept insurance coverage. However, buyers may be able to provide an insurance claim or check whether their insurance provider may help reimburse some of the costs involved in home testing.

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 may 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 questions about their test results.

How can I increase my vitamin D levels?

According to John Hopkins Medicine, the body is able to make vitamin D naturally when a person exposes it to the sun. However, there may be limitations if a person is older, lives further north, or has a darker skin tone.

Moreover, it is common knowledge with decades of research that sun exposure is extremely harmful to the largest organ in the body — the skin, leading to faster aging, wrinkles, exacerbation of existing conditions, and skin cancer. As such, it is better to add vitamin D intake from food and supplements.

That said, a person can add certain foods containing vitamin D to their diet. These include:

The United Kingdom’s National Health Service (NHS) recommends that people consider taking 10 micrograms of vitamin D supplements every day during autumn and winter, as it can be difficult to get enough of the vitamin from food. This includes those who are pregnant or breastfeeding.

What is a regular vitamin D range?

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

  • Deficiency: Below 30 nmol/l or 12 ng/ml.
  • Inadequate levels: 30–50 nmol/l or 12–20 ng/ml.
  • Adequate levels: 50–125 nmol/l or 20–50 ng/ml.
  • High levels: Above 125 nmol/l or 50 ng/ml.

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 experience symptoms of vitamin D deficiency or receive test results indicating they may be deficient in vitamin D can consider talking with a doctor for treatment advice.