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vitamin b12 injections intramuscular or subcutaneous injection vs.intramuscular b12 im sq Subcutaneous (SC) and (IM) Injections– Compounded Cyanocobalamin (Vitamin B12) Injection
Description
6 It is taken up by cells in larger amounts per unit time and is better retained in the body than cyanocobalamin

Although some multivitamins contain B12, there is rarely enough to restore the bodys B12 levels

Oral intake of vitamin B12 has a complex absorption mechanism involving "intrinsic factor", and typically only 1% of oral vitamin B12 is absorbed, so it is interesting that the levels used in this study were sufficient to substantially improve methylation, glutathione, and oxidative stress

Good sources are meats like beef, liver, and chicken
