Dietary Supplements Vitamin B-12 deficiency can be corrected by eating foods rich in B12 and taking dietary supplements, such as B12 supplements or multivitamins
In fact, one study found cyanocobalamin was more effective for maintaining adequate vitamin B12 levels, while an older study found that both forms were effective in treating a deficiency
It is derived from the intestinal mucosa of pigs and is used in some parts of the world to prevent venous blood clots and treat chronic disorders of the veins
If you do not eat a diet rich in B12 vitamins or drink alcohol regularly, you may need to supplement with an injection sooner rather than later
DOI: 10.1093/qjmed/hct051 Arendt JFH et al, "Elevated vitamin B12 levels and cancer risk in UK primary care: A THIN database cohort study." Cancer Epidemiology, Biomarkers & Prevention, April 2019
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