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Also reported in: mcmol/L, umol/L
Your methylmalonic acid is within normal limits, indicating adequate intracellular B12 function. MMA is one of the most accurate markers of true B12 deficiency at the cellular level — more reliable than serum B12 alone.
Very low methylmalonic acid means your cellular B12 biochemistry is running optimally — there is no accumulation of this toxic metabolite. This is the ideal finding.
No action needed. This is an excellent result indicating healthy B12 status at the tissue level.
Methylmalonic Acid: {{value}} {{unit}} — very low (ref: {{low}}–{{high}})Low MMA indicates B12 is efficiently working in your cells, preventing the toxic accumulation of methylmalonic acid. This is a favorable indicator of intracellular B12 sufficiency.
No action needed.
Methylmalonic Acid: {{value}} {{unit}} — lowLow-normal MMA indicates good intracellular B12 status — B12 is working effectively in your cells.
No action needed. Continue current B12 intake.
Methylmalonic Acid: {{value}} {{unit}} — borderline lowYour methylmalonic acid is within normal limits, indicating adequate intracellular B12 function. MMA is one of the most accurate markers of true B12 deficiency at the cellular level — more reliable than serum B12 alone.
No action needed. Good result.
Methylmalonic Acid: {{value}} {{unit}} — within reference rangeOptimal MMA indicates that B12 is functioning perfectly at the cellular level — metabolic pathways that depend on B12 are running cleanly without toxic byproduct accumulation.
Excellent result. Your B12 status is healthy at the tissue level.
Methylmalonic Acid: {{value}} {{unit}} — optimalA borderline high MMA is an early and sensitive sign of functional B12 deficiency — meaning B12 is insufficient at the cellular level even if serum B12 appears normal. This can precede clinical symptoms by months to years.
Start B12 supplementation (sublingual methylcobalamin 1,000 mcg daily). Retest MMA in 3 months. This is especially important in vegans, older adults, and those on metformin or PPIs.
Methylmalonic Acid: {{value}} {{unit}} — borderline highElevated MMA is consistent with B12 deficiency at the cellular level — a more definitive marker than serum B12 alone. When B12 isn't working in cells, methylmalonic acid accumulates and becomes neurotoxic, damaging the myelin sheaths around nerve fibers. Neurological symptoms may already be developing.
Treat B12 deficiency aggressively — sublingual methylcobalamin 2,000 mcg daily, or B12 injections if malabsorption is suspected. Address the underlying cause (diet, medication, pernicious anemia). Retest in 3 months.
Methylmalonic Acid: {{value}} {{unit}} — above reference range (ref: {{low}}–{{high}})Very high MMA indicates noticeable, long-standing B12 deficiency at the cellular level. Significant neurological damage is likely underway — subacute combined degeneration of the spinal cord can cause progressive, potentially irreversible paralysis and sensory loss if not urgently treated.
Seek urgent medical care. B12 injections are needed to bypass any absorption issues. Neurological evaluation is warranted. Do not delay treatment.
Methylmalonic Acid: {{value}} {{unit}} — very high (ref: {{low}}–{{high}})Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.