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Understanding Vitamin B12s Role Vitamin B12 is essential for your body to function properly

Autoimmune and inflammatory conditions : Diseases such as rheumatoid arthritis or lupus can cause high B12 levels

Vitamin B12 Injection Dose for Children For children with vitamin B12 deficiency, an initial dose of 0.2 mcg/kg injected into the muscle or under the skin daily for 2 days, followed by daily 1000 mcg injections for 2-7 days, then weekly 100 mcg injections for 4 weeks, may be recommended

Trouble focusing or memory lapses: With too little B12, your brain clouds up, making it hard to stay sharp or hold onto thoughts clearly