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With an oral supplement, the B12 needs to be absorbed through your digestive system first before getting to your blood, which takes a lot longer
Additionally, lifestyle factors like diet and exercise can influence the longevity of the shots effects
High expression of nicotinamide N-methyltransferase in patients with obesity and insulin resistance
The length of the infusion is also important
Over time, it may help prevent or improve medical conditions linked to low B12 levels, such as anemia and nerve damage
Supplementing with vitamin B12 is particularly common, because deficiency is widespread
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