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LOOP or Standard Duodenal Switch: It is generally recommended to take 500 to 1,000 micrograms (mcg) of vitamin B12 daily, either in the form of oral supplements or injections

In liver diseases such as hepatitis, fatty liver disease, or cirrhosis, stored B12 and B12binding proteins may be released into the bloodstream, contributing to elevated levels

However, there were no significant changes in FEV 1 or FEV 1 /FVC ratio [80]

Talk with your doctor or a registered dietitian about whether or not you should supplement with B12 and how much you should take.

However, athletes such as gymnasts, who practice excessive wrist rotation, can also be at risk