The uMMA test results are reported in specific units. The units are mmol MMA/mol cr. Normal vitamin B12 status is indicated when the result is below 3.6 mmol MMA/mol cr, but new research shows that an optimal level is below 2.0 mmol MMA/mol cr. A result above 3.6 mmol MMA/mol cr indicates a possible B12 deficiency. More testing is often needed to confirm true deficiency, so please consult with your healthcare provider if you get this result.