The injections, whether B-12, Lipo-B12 or Super B-12, are to be given as intramuscular injections, ONCE A WEEK (5 to 7 days okay for optimal utilization, 4 to 8 days interval is either too early or too later) If you want, you can take the 5 or 10 shot injection kit of any kind home for self-administration
"Effect of chronic ranitidine treatment on secretion of intrinsic factor"
Blood , 103 (5), 15731579
Clinical trials
The Food and Nutrition Board, the National Academy of Sciences-National Research Council recommend that lactating women should consume 4 mcg of vitamin B12 daily (11)
There are two types of prescription only vitamin B12 medicines that are listed in the British National Formulary (BNF) by NICE (National Institute for Health and Care Excellence) to be used for treating vitamin B12 deficiencies hydroxocobalamin and cyanocobalamin