Methylmalonic Acid

The Methylmalonic Acid (MMA) Test measures the level of methylmalonic acid in the blood or urine to assess vitamin B12 status at the cellular level. Elevated MMA levels may indicate vitamin B12 deficiency, even when blood B12 concentrations appear normal. This test is commonly used to investigate symptoms such as fatigue, weakness, numbness, tingling, memory changes, or anemia and can help identify early or functional vitamin B12 deficiency. Results provide valuable insight into nutrient metabolism, nerve health, and overall metabolic function.