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Low oxygen delivery can slow down metabolic functions, making it harder for your body to burn calories

Pernicious anaemia, a condition marked by the deficiency of vitamin B12 due to the inability of the body to absorb it, necessitates lifelong treatment to manage symptoms and prevent complications

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People with normal liver function store 50% of their vitamin B12 in their liver, so if your liver is not functioning properly, you may need more vitamin B12 shots than those whose livers are working as designed