Methylmalonic acid (MMA) is a compound that reacts with vitamin B-12 to produce coenzyme A (CoA). Coenzyme A is essential to normal cellular function. When vitamin B-12 deficiencies occur, methylmalonic acid levels increase.
Urinary MMA is a Superior Test For Detecting B12 Deficiency, and for Good Reason.
The MMA Test Teaches a Lot About Why B12 is So Important for Energy
First Study to Find a Link