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A vitamin deficiency test may help identify gaps in your diet for vitamins B12 or D, iron, or more. Consider tests from Labcorp, Everlywell, and LetsGetChecked.

If you eat a balanced diet and don’t have an underlying health condition that affects nutrient absorption, you likely don’t have a nutritional deficiency. But if you’re concerned about not getting enough nutrients, you may consider taking a vitamin deficiency test. These at-home tests typically require a small blood sample, come with mail-back packaging, and yield results within a week.

Read on to learn how vitamin deficiency tests work and which products we recommend to help inform your next steps.

PriceResult timeNutrients testedIn-person collection?
LetsGetChecked Micronutrient Test
$1792–5 days• vitamin B12
• vitamin D
• vitamin E
• copper
• selenium
no
LetsGetChecked Essential Vitamin Test$1092–5 days• vitamin B12
• vitamin D
• vitamin E
no
Labcorp Ferritin Blood Test$491–2 daysferritin (iron)yes
Labcorp Vitamin Deficiency Test
$1591–2 days• vitamin B12
• folate
• vitamin D
yes

Everlywell At-Home Vitamin D Test
$495–7 daysvitamin Dno
  • Nutrients measured: We looked for tests that check for common vitamin and mineral deficiencies.
  • Testing methods: The tests we chose use a reliable testing method (the finger-pricking method instead of saliva samples).
  • Lab and clinician credentials: We looked for tests that use labs that meet the CLIA standards and offer you the ability to verify the credentials of the company’s health professionals who review the results.
  • Cost: We considered overall quality for the price.
  • Ease of access: To help you streamline the process, we included options that allow you to test at home without obtaining a doctor’s order for a full vitamin panel blood test. You can then share your results with a medical professional.
  • Reviews: The tests on our list have mostly positive customer reviews and anecdotal experiences.

If you eat a balanced diet and don’t have an underlying health condition that affects nutrient absorption, you likely don’t have vitamin deficiencies.

That being said, as much as one-third of the U.S. population may have a higher risk of at least one nutrient deficiency or anemia. For example, vitamin B6 is one of the most common micronutrient deficiencies. Meanwhile an estimated 20% of U.S. adults ages 60 and older have a vitamin B12 deficiency.

In the United States, deficiencies are more common in the following nutrients:

  • iron
  • vitamin C
  • vitamin D
  • vitamin A
  • vitamin E
  • folate
  • iodine

If you’re concerned about not getting enough nutrients, or if you’ve experienced vitamin deficiency symptoms, a good first step is to talk with a medical professional. They will want to explore what could be going on, including prescribing blood work to test your nutrient levels among other measurements.

Some at-home tests for vitamin deficiencies may be more reliable than others. For instance, blood samples may be more accurate than saliva samples at detecting certain nutrient deficiencies.

Much like blood tests ordered at a doctor’s office or hospital, most at-home nutrient deficiency tests are processed in labs certified by CLIA. It’s wise to double-check for this before purchasing an at-home test.

Still, several factors can affect the accuracy of at-home tests, such as:

  • errors with sample collection or contamination
  • certain supplements — such as biotin — can falsely elevate levels of specific nutrients
  • using lotions or sunscreens that contain zinc
  • Nutrients: Each kit tests for levels of various nutrients, so evaluate which ones are most important based on your needs.
  • Follow-up: Some testing kits include follow-up support and guidance from a medical professional after you receive your results, while others recommend sharing the results with a doctor.
  • Testing method: Be sure to consider which testing method you prefer. Though most tests involve collecting a sample via a finger prick, others may use saliva samples. And some still require a lab visit.
  • Accreditation: It’s important to look for companies that send samples to an accredited lab, which can help ensure accuracy and quality.
  • Price: Testing kits can vary quite a bit in price, and some may recommend testing multiple times over a longer period to monitor your levels. For this reason, it’s important to keep your budget in mind when shopping.

Vitamin deficiencies are often measured through a blood test, which is then analyzed by a lab. In some cases, a hair or saliva sample may be collected and analyzed instead.

Most at-home vitamin deficiency tests typically involve:

  • cleaning the finger where you’ll draw from
  • placing it against a firm surface and using a small lancet to draw blood
  • adding a drop of blood as directed to the collection card provided with your testing kit
  • letting the collection card dry completely
  • filling out any required information on the card
  • mailing your sample back to the lab using the provided shipping label

Be sure to check the instructions included in your testing kit, as the collection procedure may vary for different products.

Vitamin A deficiency is rare in developed nations but is common in developing countries.

A doctor wouldn’t test you for vitamin A deficiency unless you showed symptoms of possible deficiency, or were in a high risk group.

If you’re searching for at-home vitamin deficiency tests, you’ll find several options. We’ve included five recommendations that address some of the most common deficiencies. These companies are all CLIA certified, and healthcare professionals will review your results.

If you decide to move forward with testing, discuss your results with a doctor or registered dietitian. They can help you decide whether you need further testing, dietary changes, or supplementation.