Methylmalonic Acid (MMA) Blood Test

Worried about a vitamin B12 deficiency? This test measures methylmalonic acid (MMA), which builds up in the blood when B12 levels are too low.

  • Doctor reviewed
Sample
Blood
Collection
In-store clinic or home nurse visit or venous draw at clinic
Results in
10 days
Biomarkers
1
Doctor reviewed
Yes
Tests for
  • Methylmalonic acid - serum

Test specifications

Provider
Medichecks
Sample type
blood
Collection method
in-store clinic or home nurse visit or venous draw at clinic
Turnaround time
10 days
Biomarkers tested
1
At-home test
No
Doctor reviewed
Yes
Gender focus
Both

What's tested

1 biomarker as listed by Medichecks.

Vitamins

  • Methylmalonic acid - serum

About this test

Worried about a vitamin B12 deficiency? This test measures methylmalonic acid (MMA), which builds up in the blood when B12 levels are too low. It's more sensitive than a standard B12 test, making it useful if you have symptoms like fatigue, tingling in the hands and feet, or brain fog but normal or borderline B12 levels. This test helps assess whether your body is properly using B12 for energy and nerve function.

Description provided by Medichecks.

Our editorial score

Compare Health Test Score
Editorial confidence: 10.0/10

Score breakdown

  • Clarity and documentation 8.0/10

    The listing publishes a short description, the full biomarker list, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.

  • Clinical depth 6.3/10

    1 biomarkers, placing it in the 31st percentile of vitamins tests we track.

  • Collection convenience 4.0/10

    Requires a venous draw at a clinic; a home nurse visit is offered; results in around 10 days.

  • Results and follow-up 7.0/10

    Results are reviewed by a doctor.

  • Trust signals 9.5/10

    Trustpilot 4.5 from 2,477 reviews; accredited lab (UKAS ISO 15189 partner labs); doctor review as standard; trading 25+ years.

  • Value for money 2.7/10

    £149.00 against a median of £85.00 for the 73 similarly sized vitamins tests we track (+75%).

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Iron, Vitamin D & B12 Deficiency Blood Test

A 3-marker blood test combining ferritin, vitamin B12 and vitamin D, aimed at people at higher risk of these common deficiencies, such as those on plant-based diets or with limited sun exposure.

  • At-home test
8.8 / 10 Three common deficiencies bundled below the market median