glutathione or vitamin c individual packet target. Emergen-C Drink Mix Packets PURCELL L-Glutathione Vitamin Boosting Toner
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doi: 10.1182/blood.2021014804 81 DillonRHillsRFreemanSPotterNJovanovicJIveyAet al

Linnerbauer, M., Wheeler, M
M.ColeB.HongF.MocklerT
Published evidence indicates that B12 deficiency can make HbA1c unreliable, but the direction of the distortion whether the result is spuriously high or spuriously low is variable and may depend on the degree of anaemia, the specific HbA1c assay used, and other concurrent conditions

Theres also the possibility that your B12 deficiency itself keeps progressing

An efficient and stable lentivirus-mediated gene transduction system designed for enhanced gene expression in hematopoietic cells
