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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

Exclusion criteria included the following: (1) alcohol consumption greater than 20 g/day

Subjects had to be over 15 years of age, present with soot in the mouth and expectoration (to indicate smoke exposure), and have altered neurological status

For intramuscular administration as directed by a physician

Most domestic orders arrive within standard expedited transit windows, depending on destination and carrier routing