Gastrointestinal conditions Some gastrointestinal conditions may affect how vitamin B12 is digested or absorbed, such as: history of gastrointestinal surgery celiac disease Crohns disease pernicious anemia infections, such as from Helicobacter pylori bacteria or parasites pancreatic insufficiency or cancer bowel cancer folic acid deficiency small intestinal bacterial overgrowth Vitamin B12 injections may be more helpful for people with gastrointestinal conditions than oral products
For a large portion of the population, that was always going to be a dealbreaker
While your body naturally produces glutathione, levels decrease due to aging, stress, illness, pollution, poor nutrition, and alcohol consumption
Lei J, Sun LC, Huang S, Zhu C, Li P, He J, Mackey V, Coy DH, He QY (2019) The antimicrobial peptides and their potential clinical applications