Choose based on your primary goal, start conservatively, and adjust based on results
If no adverse effects occur, increase to 300-500mcg for the remainder of the cycle
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LiverTox: Clinical and Research Information on Drug-Induced Liver Injury
see Table 1) ( TABLE 1 Vitamin B12 Adequate Intake [AI] across life course ( Comparable age groupings are proposed in the Dietary Guidelines for Americans, though the recommended intake levels differ, beginning at 0.5 g in infancy, increasing to 2.4 g for adults, and rising modestly during pregnancy and lactation (2.6 g and 2.8 g, respectively