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oral vitamin B12 replacement When offering oral vitamin B 12 replacement to people with vitamin B 12 deficiency caused, or suspected to be caused, by malabsorption, prescribe a dosage of at least 1 mg a day

For example, 0.25 mg is the same as 250 mcg

In UK practice, monitoring is primarily based on clinical response rather than routine blood tests, as post-treatment serum B12 measurements can be misleadingly high and may not reflect tissue levels

Symptoms of Deficiency Fatigue and Weakness Low levels of vitamin B12 can lead to fatigue and weakness

The mechanism underlying these opposing gastrointestinal effects likely relates to semaglutides complex effects on gastrointestinal motility, with some patients experiencing accelerated intestinal transit while others experience overall slowing of gastrointestinal motility