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People with certain allergies or sensitivities to cobalt or vitamin B12 should consult their healthcare provider before receiving injections

What are the possible side effects

Studies show that the increased fat burning associated with fragment 176-191 directly correlates with energy expenditure and thus weight reduction, leading to a nearly 50% reduction in weight gain in obese animals over a three-week course [4]

Still, side effects from B12 supplements are possible, especially at higher doses, and include: Headache Nausea Vomiting Fatigue Weakness Diarrhea Tingling in the hands and feet Nasal spray Vitamin B12 is also available in a nasal spray

The primary mechanism involves intrinsic factor binding in the stomach, while a secondary pathway allows small amounts to absorb through passive diffusion