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Vitamin B12 shots offer a direct route to repletion if you compare options
The most common causes include B12 supplementation (particularly injections), liver disease releasing stored B12, haematological disorders increasing B12-binding proteins, and chronic kidney disease reducing B12 excretion
The average diet supplies about 5 to 15 mcg/day of vitamin B12 in a protein-bound form that is available for absorption after normal digestion
In severe cases, a vitamin B12 deficiency can lead to neurological damage and even death
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