What is a normal methylmalonic acid level?
The short answer
A typical US lab calls methylmalonic acid normal up to 378 nmol/L. That range exists to catch disease, not to describe your best.
Nobody we follow has put a number on your Methylmalonic Acid level. They talk about the dose you take, not the level in your blood.
What Methylmalonic Acid measures
A compound that piles up when B-twelve falls down on its job inside cells.
It can show a shortage while a direct B-twelve measurement still reads fine.
Checked against MedlinePlus — Methylmalonic Acid (MMA) Test.
Common questions
What is a normal Methylmalonic Acid level?
Most US labs print 0–378 nmol/L. Your report grades you against that range. It exists to catch disease, not to describe your best.
What does your Methylmalonic Acid number mean?
On a typical lab range, up to 378 nmol/L is normal and over 378 is high. Your own report prints its range next to your number, and that is the one your lab uses. Nobody we follow has drawn a line inside that range.
What does the Methylmalonic Acid test measure?
A compound that piles up when B-twelve falls down on its job inside cells. It can show a shortage while a direct B-twelve measurement still reads fine.
Why is there no target here?
Because the people we follow discuss Methylmalonic Acid as something you eat or take. Nobody has said what the level in your blood should be.