difen b12 injection side effects Vitamin Supplements and Injections in Orlando FL How Long Do The Side

It's not that they are not trying hard enough, or trying in the right direction

Anyway...here's some links (annotated so that you can find things more easily)

Key comparisons between B12 injections and B12 supplements: Effectiveness & Speed Injections bypass the digestive system, providing immediate, high-dose availability, which is crucial for reversing severe symptoms quickly

Several factors can impair B12 absorption: Reduced stomach acid production (achlorhydria or hypochlorhydria), common in older adults and those taking proton pump inhibitors or H2-receptor antagonists long-term, impairs the release of B12 from food proteins Pernicious anaemia , an autoimmune condition destroying parietal cells and reducing intrinsic factor production, completely blocks the primary absorption pathway Gastrointestinal disorders including Crohn's disease, coeliac disease, or surgical removal of stomach or ileum sections directly damage absorption sites Metformin , commonly prescribed for type 2 diabetes, may reduce B12 absorption through unclear mechanisms