Measures methylmalonic acid, a marker used to help clarify vitamin B12 status when a standard B12 result is unclear.
About this test
This test is available at our clinic in Bournemouth. Methylmalonic acid is a substance that can build up when the body does not have enough usable vitamin B12. This test may be used when a standard B12 result is borderline or does not clearly explain symptoms. It can provide additional information about whether B12 is functioning adequately at a cellular level. The result may be considered when investigating tiredness, numbness, tingling, or certain types of anaemia. MMA can also be affected by kidney function, so it must be interpreted in context. No special preparation is usually required.
What’s included1 marker
- Methylmalonic acid – serum
What to expect
Before your test
Drink plenty of water beforehand. It makes the blood draw easier.
Some tests need you to fast for at least 12 hours, with water only. If you're not sure about yours, ask us before your appointment.
Stop oral and IV vitamin supplements 24 hours before your test, as they can affect some results. Keep taking your regular prescribed medication unless your GP tells you otherwise. Some types of hormonal contraception can affect results, so mention it to us.
At your appointment
You'll fill in a short medical questionnaire first. We'll also check your blood pressure, heart rate and blood oxygen level. A healthcare professional then takes your sample from a vein at our clinic. The visit takes about 15 minutes.
A cold numbing spray is available if you'd like one. If you feel nervous, tell us and we'll help you feel at ease.
Your results
Results usually take 3 to 7 working days. We can't guarantee this, because some things are outside our control. A doctor reviews your results and adds recommendations to your report. We email the report to you as a PDF.
If there's a problem with your sample, we may ask you to come back for another blood draw.
After your test
You don't need any recovery time. Keep the dressing on for 30 minutes and keep it clean and dry.
Who can have a blood test?
Blood tests are for people aged 18 and over. You don't need a GP referral letter. Please book tests for yourself only.
Appointments are available Monday to Saturday.
Are the laboratories accredited?
Your sample is analysed in a laboratory that is CQC-registered and accredited by UKAS.
A blood test gives you information. It isn't a diagnosis. If you have symptoms or you're worried about your health, speak to your GP.