red urine after vitamin b12 injection Compounded Methylcobalamin (Vitamin B12) Injection, 5mg/mL Why Do I Feel Worse

National Health and Nutrition Examination Survey data found that the normal serum MMA range for the 2.5th to 97.5th percentile of people 70 years, who were considered to be vitamin B12-replete and with normal kidney function, was 84 to 317 nmol/l (Mineva, 2019)

People may be deficient in vitamin B12 if they dont eat animal products, or if their body does not absorb it well naturally

Vegans, vegetarians, older adults, and people with digestive conditions such as Crohns disease or coeliac disease are at higher risk, according to the NHS

Nat Rev Dis Primers 6

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