@cathjerry
Good question, and I do not have an answer. When I had my surgery in 2012, they started me on B12 injections and have been doing them ever since. I tried Googling to see if there was any data, and most articles implied that B12 injections or supplements may yield the same results. B12 injections bypass the digestive system; maybe that is an advantage. I do not mind gining my self injections and only need to do it once every 21 days. If doing supplements, not sure of frequency.

Good question for your provider.