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For a lot of people, the change shows up somewhere in the first one to three days
Because the injection bypasses your digestive system, your body can access the B12 quickly instead of waiting for absorption from food
Many people do both, but it is worth a quick chat with your provider first
Since B12 is processed in the liver, excessive amounts could potentially lead to complications in severe liver conditions
Regular monitoring and adjusting the dosage may be required for individuals with these conditions
High doses of B12 may worsen the disease and cause irreversible damage to the optic nerve
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