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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
The GS-TNB is subsequently reduced by glutathione reductase and -nicotinamide adenine dinucleotide phosphate (NADPH), releasing a second TMB molecule and recycling the GSH
Some patients might also experience headaches, lightheadedness, or stomach upset, such as mild nausea [2]
Studies indicate that individuals with higher levels of glutathione may experience better outcomes related to metabolic syndrome, which can support weight management efforts
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