Symptoms may develop gradually and include fatigue, weakness, constipation, loss of appetite, weight loss, numbness or tingling in the hands and feet, difficulty maintaining balance, depression, confusion, and poor memory
If you observe any of these signs, do not use the vial
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The bacteria eat this vitamin and produce a molecule that is similar to the structure of B12 this molecule competes with vitamin B12 receptors, resulting in decreased absorption of B12