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However, certain populations are at higher risk of deficiency: Adults over 50 (reduced absorption capacity) Individuals following vegan or strict vegetarian diets Those with gastrointestinal conditions such as Crohns disease or celiac disease Individuals taking long-term acid-reducing medications (PPIs, H blockers) When oral supplementation is insufficient or absorption is compromised, vitamin B12 shots deliver the nutrient directly into the bloodstream, bypassing the digestive system entirely

The deficiency can occur when people have difficulty absorbing foods with B12 in the small intestine

During covid with long delays they were always available to help answer questions

[DOI] [Google Scholar] 17.Janiak MC, Pinto SL, Duytschaever G, Carrigan MA, Melin AD

10.1016/j.arr.2022.101817 Ageing Res

Over time, these approaches can come with their own drawbacks, such as gut lining damage or liver stress