futility of vitamin b12 injections Cobalamin (vitamin B12) and Folate Deficiency Vitamin B12 Supplements and Injections
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Remember, self-administration without proper medical guidance is not recommended and can potentially lead to adverse effects

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Participants receiving the highest dose (1.0 mg) achieved a mean weight loss of 10.6%, while those in the placebo group experienced a mean weight loss of only 2%

doi: 10.3390/ijms19092722 29

This will help them determine what steps are necessary to provide you with the safest possible surgery