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how to give subcutaneous b12 injections Optimal Injection Sites for Maximum Absorption and Benefits Compounded Cyanocobalamin (Vitamin B12) Injection
Description
Mice from a different substrain and vendor, but fed similar lean and high-fat diets to this study, showed a predominance of the family Erysipelotrichaceae, of which Ileibacterium is a genus, in their cecal microbiomes 76

Injections bypass the gut and correct deficiency
The results of the last two studies indicated that the effect of B12 on tHcy should be measured in patients with normal serum folate
I'm sure you've exhausted all forums and tried all remedies however I will say that zinc tablets seem to help me as does anti inflammatory foods