As most of us are aware of and appreciate, there is very little after care needed after a sleeve. However it is important that we should know that we need to take vitamins for the rest of our lives. This is due to the fact that Vitamin B12 is synthesised by "Intrinsic Factor" which is produced in the stomach. Long term loss of this vitamin may result in anaemia later on. Sorry to sound pedantic, but treatment is regular injections of B12 - much easier to swallow a tablet.