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When adverse effects occur, they may include mild skin reactions, gastrointestinal disturbance, or headache, typically following high-dose intramuscular injections rather than oral supplementation
Symptoms of Vitamin B12 deficiency include fatigue, weakness, constipation, loss of appetite, and weight loss
Metabolic rate adjusts to a lower body weight
This is because the complex of B12 and intrinsic factor is absorbed via a limited number of special receptors in the intestinal mucosa
Irritation at the injection site is the most common reaction
At this concentration a 2 mg dose is only 0.1 mL (10 units)
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