iScience 26(1):105850 Hanahan D (2022) Hallmarks of cancer: new dimensions
Its bacteriostatic properties inhibit microbial growth, allowing reconstituted solutions to remain stable and contamination-free for up to 28 days after first use
You need a prescription, even though B12 is very safe to inject and you cant overdose
Nat Rev Dis Primers (2017): Vitamin B12 is essential for normal nervous system function via its role in myelin synthesis and for circulatory system function through its role in red blood cell maturation in the bone marrow
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
Diet pills that affect neurotransmitters in the brain to help with weight loss, such as bupropion and naltrexone (Contrave) can be linked with headache, dry mouth, and dizziness, as well as stomach side effects like nausea, vomiting and constipation