2007 Kaiser/HRET drew its sample from a Survey Sampling Incorporated list (based on an original Dun and Bradstreet list) of the nations private and public employers with three or more workers
If your 50 units delivers 15 mg from a 30 mg/mL vial, you are getting the maximum dose from relatively little liquid, stretching your vial further than someone who needs 300 units (3 mL) of a 5 mg/mL solution for the same 15 mg dose
For patients whose levels fall in the borderline or gray zone, a methylmalonic acid (MMA) test provides greater specificity MMA levels rise when B12 is functionally inadequate at the cellular level, even if serum B12 appears borderline normal
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If you are trying to better understand absorption and effectiveness, Does Oral Glutathione Work