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These conditions digestive conditions, such as Crohns disease and ulcerative colitis autoimmune conditions, such as celiac disease and type 1 diabetes genetic conditions, such as inherited intrinsic factor deficiency and inherited transcobalamin deficiency chronic pancreatic disease pernicious anemia vitiligo Other factors that may lead to a vitamin B12 deficiency can include drinking excessive amounts of alcohol or using certain drugs, such as some heartburn medicines and metformin
Accessed on 27 September 2023
"We emphasize that as the clinical investigator, it is your responsibility to ensure that studies are conducted in accordance with the investigational plan, both to protect the rights, safety, and welfare of subjects and to ensure the integrity of study data." FDA noted that two of the nine randomized subjects who received the investigational product were not eligible under the enrollment criteria
Jiang Y, Zhao J, Li R, Liu Y, Zhou L, Wang C, et al
