b12 injection for nerve pain Methylcobalamin (Vitamin B12) Vitamin B12 Injections (Cyanocobalamin Injections)

or p.o., is of benefit

Most people meet these needs through diet alone, but older adults, people on strict plant-based diets, and those with digestive disorders may benefit from supplements, though dosages vary based on individual needs

Rotate sites each day to reduce irritation and lumps

Strict vegans/vegetarians with low intake who prefer a rapid correctionthough high-dose oral B12 is usually effective (AAFP)

Benefits: B12 is used in the metabolism of fats, proteins, and carbohydrates

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