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Common signs include fatigue, brain fog, numbness or tingling, irritability, and shortness of breath

Vitamin B12 injections are far from the only way to get vitamin B12

Other people generally at risk are those who have had intestinal surgery, including weight loss surgery, and those with diseases that affect the gut i.e., Crohns disease It is a crucial element in the construction of DNA

This is often seen as a positive sign that the peptide is working

Methylcobalamin is often marketed as a 'natural' or 'bioactive' form, though evidence regarding superior efficacy compared to cyanocobalamin remains limited for most people