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Text on a gray background highlights that up to 86.5% of plant-based (vegetarian and vegan) individuals are B12 deficient, with emphasis in yellow.

At-Home Vitamin B12 Status Marker Test Kit

Vitamin B12 is a critical nutrient for red blood cell formation, neurological function, DHA synthesis, and heart health.* But it’s one of the most common nutrients for plant-based and plant-centered eaters to fall below optimal levels.

This simple at-home Vitamin B12 test measures the amount of methylmalonic acid (MMA) in the urine, which is a specific indicator of low B12 status. The more MMA you have, the more likely you are to be low in this critical nutrient.

The test is processed in a CLIA-certified laboratory, with results and plant-based recommendations delivered through our secure Complement app.

Regular priceDefault Title - $74.00 USDADD TO CART$74.00

$74.00

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A black cat sits comfortably inside a cardboard box, peering out with bright yellow eyes. Its ears are alert, and the box is slightly worn. The background is a plain white, highlighting the cats shiny, dark fur.
  • Test your MMA, a vitamin B12 status marker, at home.
  • Know if you’re at risk of vitamin B12 deficiency.
  • Optimize your levels to support cellular, brain, and foundational health.*
  • Tests processed in a CLIA-certified laboratory.
  • Results delivered through our secure Complement app.
A person holds a smartphone displaying information about a B12 test from Complement. Text on the image highlights the benefits of at-home testing, emphasizing time and cost savings, along with specific results for plant-based eaters.

Why do we use a urine test to look for vitamin B12 levels?

A gloved hand holds a test tube labeled Vitamin B12 Test. The tube has a pink cap and contains a light-colored liquid. Blurred laboratory equipment is visible in the background.

Vitamin B12 is stored in your liver and can be reused by your body for up to 10 years.

Because of this, when you don’t get enough B12 from your food, your body may not show signs of deficiency right away. This can make it tricky to know if you need more B12 by checking your blood levels alone.

However, there’s another way to find out if you have a deficiency at a cellular level early on. It involves looking at a substance called MMA, which can be found in both your blood and urine.

By measuring the levels of MMA in your urine (while correcting for creatinine levels), you can get a better indication if you need more B12. This test is more sensitive and can detect even small changes in MMA levels.

One advantage of testing MMA levels in urine is that it helps reduce the chances of kidney issues giving false results, which is not the case with blood MMA levels. Additionally, the urine sample can stay good for several weeks without degrading, so it can be accurately tested in the lab.

How it works

Step 1

Collect your sample.

The best way to understand your health is to periodically test certain nutrient levels and biomarkers. Our test kits provide a safe, simple, and sanitary way to gather samples in the convenience of your home.

Step 2

Mail it in.

Return your test to our CLIA-certified laboratory in the included pre-paid and address envelope.

Step 3

Review your results.

Within a few weeks, you’ll be notified that your results have been uploaded to our secure Complement Well app for you to review.

Step 4

Optimize your health.

Empowered with a better understanding of your health, you can take diet, supplementation, and lifestyle actions to further optimize your health for longevity.

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