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Vitamins and minerals are micronutrients that provide support for many crucial functions throughout the body. If a person has concerns over their vitamin and mineral levels, they can use an at-home test to check for deficiencies.

Although the Dietary Guidelines for Americans 2020–2025 indicate that a person should aim to meet their vitamin and mineral needs through their diet, sometimes they may need a multivitamin to supplement their intake.

When a person develops a nutritional deficiency, the body may produce signs and symptoms, some of which can go unnoticed. Though an at-home test should not act as a substitute for a doctor or nutritionist’s advice, it may indicate missing nutrients in a person’s diet.

The Centers for Disease Control and Prevention (CDC) lists several of the most common deficiencies in the United States. These include:

Learn more about vitamins and how they work here.

High risk groups

In a 2019 study, researchers identified specific groups of people as having a higher risk of developing vitamin or mineral deficiencies. The groups included:

  • undernourished people
  • older adults
  • people who are pregnant
  • adolescents
  • young children

A person interested in seeing if they may have a vitamin deficiency can purchase a home-testing kit to check for possible deficiencies.

At-home tests offer convenience, confidential results, and ease of use. However, as with most at-home tests, the main drawback is that a person will still usually need to contact a doctor if their test results show a deficiency. They may also need to visit a doctor if they have symptoms but the test comes back negative.

An at-home test can sometimes be expensive, depending on the brand. An individual may sometimes find it more cost-effective to go directly through a lab, which sometimes bills their insurance provider directly.

Medical News Today’s methodology

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

  • 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 are suitable for 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.

Below find some vitamin deficiency 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 and correct at the time of publication.

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

Best overall: LetsGetChecked Micronutrient Test

  • Price: around $200
  • Turnaround time: within a few days

The LetsGetChecked micronutrient test is a finger prick test that a person can carry out at home.

The test can check for deficiencies in several vitamins and minerals, including:

When a person gets their test kit, they should register it online and then follow instructions to collect a sample and return it for testing.

Once the lab receives the test, LetsGetChecked state a person can expect to receive their results within a few days.

Learn more about LetsGetChecked here.

Best for vitamin D deficiency: Everlywell Vitamin D and Inflammation Test

  • Price: around $99
  • Turnaround time: within days

Everlywell offers a test that looks at a person’s vitamin D levels and the measure of c-reactive protein (CRP), called hs-CRP. The liver makes CRP when there is inflammation in the body.

This finger prick test allows a person to easily collect their sample and send it off to a lab for testing. Independent, board-certified doctors will review the results and explain them in easy-to-understand terms.

The company then sends the results to a person’s online account, which they access via a secure login.

The test costs around $99, but if a person becomes an Everlywell member, the price lowers to around $25.

Learn more about Everlywell here.

Best for essential vitamin tests: LetsGetChecked Essential Vitamin Test

  • Price: around $110
  • Turnaround time: within days

LetsGetChecked also offers a less extensive test for vitamin deficiencies with their Essential Vitamin Test. The test checks the blood for deficiencies in three vitamins, including:

  • vitamin D
  • vitamin B12
  • vitamin E

Once a person receives the test, they should register it on the LetsGetChecked website and follow the instructions.

The home test involves a finger-prick blood sample collection that an individual will send to a lab the same day.

Once received, the company’s team of doctors will review the test, and the lab will send results to the person within a few days.

Best for ease of use: Baze

  • Price: around $199
  • Turnaround time: within 11-15 business days

Baze sells an at-home vitamin deficiency test, as well as a subscription service for personalized vitamin supplementation. The Baze test covers eleven minerals and vitamins, including:

The company says its supplementation advice is backed up by scientific research, and its registered dietitians verify every order. It also says the home test arrives within 7 days.

This test involves sending a finger-prick blood sample to one of Baze’s certified labs.

A person can view their results and track their progress over time using the Baze app. The company says that blood samples are destroyed after the lab processes them for analysis.

Best comprehensive test: Vitl Vitamin DNA Test

  • Price: around $200
  • Turnaround time: within 3 weeks

Vitl also offers testing and a subscription for vitamin and mineral supplementation. Its Vitamin DNA Test checks for 13 vitamins and minerals, including:

Vitl provides a detailed report showing vitamin and mineral levels and insights into how a person can optimize their health.

Unlike the other tests on this list, this requires a saliva sample from the inside of a cheek, rather than a blood sample. A person sends off their saliva sample in a prepaid envelope.

Results and personalized recommendations are available via email within 3 weeks, Vitl says.

Best for rapid results: Rootine Blood Vitamin Test

  • Price: around $99
  • Turnaround time: within 3 days

This test checks for deficiencies of six vitamins, including:

  • vitamins B2, B6, B9, and B12
  • vitamin C
  • vitamin D

It also checks levels of omega-3s and alpha-lipoic acid.

A person takes a finger-prick blood sample and sends it to a lab for analysis. Once the lab receives the kit, the person can expect their results in 3 days.

The company says that health data is protected, secure, and never shared, sold, or used without authorization. A person can also request to have their data deleted immediately after the company shares the test results.

Here is how the products above compare.

LetsGetChecked Micronutrient TestEverlywell Vitamin D and Inflammation TestLetsGetChecked Essential Vitamin TestBaze Blood Nutrient TestVitl Vitamin DNA TestRootine Blood Vitamin Test
Number of vitamins and minerals72311138
Collection methodfinger-prickfinger-prickfinger-prick finger-prick saliva samplefinger-prick
Delivery methodonline portalonline portalonline portalmobile appemailonline portal
Time to receive results after submission5 daysdays to weeks5 days11-15 days3 weeks3 days
Price$200$99, or $25 for Everlywell members$110$199$200$99

People may wish to consider these factors before buying a test online:

  • The nutrients tested: Many companies offer comprehensive panels, which test for several vitamins and minerals. However, some tests only check levels of certain vitamins. A person should pick the test that best suits their needs.
  • The collection method: Anyone uncomfortable drawing a finger-prick blood sample may prefer a test that relies on a saliva sample instead, for example.
  • The timing of results: Some tests have shorter turnaround times, but these may be more expensive.
  • Price: Different at-home vitamin deficiency tests fit different budgets.

Regardless of the results of an at-home vitamin deficiency test, a person should consider consulting a doctor. If their results are positive, a doctor will likely double-check the the results, run other appropriate tests when needed, and help diagnose any underlying cause of the deficiency before setting out a treatment plan.

If an individual’s results are negative, but they are still experiencing symptoms of a vitamin or mineral deficiency, a doctor may carry out further tests to diagnose any underlying conditions.

A person should not attempt to treat a vitamin or mineral deficiency without first discussing it with a doctor.

Here are some of the most common questions about these tests.

Are at-home vitamin deficiency tests accurate?

The accuracy depends on the company, the sample collection, and various procedures. If the company has designed its devices in line with medical guidelines and people take their samples correctly, the test results may be accurate.

The Food and Drug Administration (FDA) has a list of approved at-home tests, and anyone concerned about accuracy may prefer to use one of these.

To help ensure accuracy, carefully follow the instructions about taking, storing, and sending off samples.

Who should use an at-home vitamin deficiency test?

Anyone who thinks that they may have an imbalance in vitamin or mineral levels should consider speaking with a healthcare professional.

If a person does not have access to healthcare or cannot leave the house, for example, an at-home vitamin deficiency test is a useful alternative.

What should I do if I have a deficiency or excess of a vitamin or mineral?

Some at-home testing companies provide supplements on a subscription basis. However, due to a company’s interest in making profits, there are concerns about bias.

A person should consult a healthcare professional to understand the reason for any vitamin or mineral excess or deficiency before deciding on a treatment.

Genetics, prescription medications, and other factors can affect levels of vitamins and minerals in the body, and a healthcare professional will take these into account.

What causes a vitamin deficiency?

In most cases, a vitamin deficiency stems from not having enough nutrients in the diet.

People who are most at risk of developing a vitamin deficiency are people with malnourishment, older adults, pregnant people, teenagers, and young children.

How can I tell if I have a vitamin deficiency?

The specific symptoms depend on which vitamin deficiency a person has.

For example, a lack of vitamin D may contribute to hair loss. A vitamin E deficiency may cause dry skin, and a vitamin B3 deficiency can cause diarrhea and photosensitive dermatitis, a skin reaction to different types of light.

At-home vitamin deficiency tests check levels of vitamins and minerals in a blood or saliva sample. They are generally convenient, but they can be expensive.

Anyone concerned about a deficiency should consult a doctor, especially if a test returns a positive result. The doctor can check for any underlying health issues, carry out further tests, and offer treatment, if needed.