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Reviewing and stopping B12 injections You should review or stop B12 injections when a blood test shows your levels have normalised, when a dietary cause can be managed with tablets, or when your GP advises a change
The needle is very fine, and most people describe the sensation as a quick pinch
A Cochrane review comparing oral and intramuscular B12 found comparable effects on blood levels, and the same principle of good absorption applies to the subcutaneous route
Clark CE, Taylor RS, Shore AC, Ukoumunne OC, Campbell JL
A subsequent 24-week Phase IIb study with 536 subjects found no statistically significant weight-loss difference , leading to termination of development in 2007
Early detection makes treatment much more effective
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