"Nitrous oxide has multiple deleterious effects on cobalamin metabolism and causes decreases in activities of both mammalian cobalamin-dependent enzymes in rats"
As always, the specific product's own labeling or your prescriber's guidance should be the deciding factor, since the right diluent can vary by compound even within these general patterns
A slightly larger injection volume is a smaller problem than a dosing miscalculation from awkward concentration math
Vitamin B12 Medicine Interactions Chloramphenicol: bacteriostatic antibiotic can interfere with red blood cell response to supplemental Vit B12 Proton pump inhibitors: omeprazole and lansoprazole, etc., slow gastric acid release and may interfere with VIt B12 absorption from food H2-receptor antagonists: cimetidine, famotidine and ranitidine slow the release of hydrochloric acid into the stomach and interfere with Vitamin B12 absorption from food Metformin: might reduce absorption of Vitamin B12 due to altered intestinal motility, increased bacterial overgrowth, etc
Reports are batch-specific not generic
GHK-Cu follows a daily or every-other-day schedule