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It can also lead to nerve damage

Additionally, individuals with autoimmune or gastrointestinal disorders, such as pernicious anemia, celiac, or Crohns disease, are more likely to be at risk of deficiency

Methylcobalamin is one of the two biologically active forms of B12, meaning it doesnt require conversion before the body can use it

Vegans and vegetarians may require a different approach, which could include oral supplements alongside injections, based on blood test results and dietary intake

DOI: 10.1038/s41467-017-01114-1 Formulation strategies for therapeutic peptide stability pH, ionic strength, co-solvency