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Description
Among common B12 side effects in older people, gastrointestinal issues like nausea or diarrhoea are most likely
Supplementing with Vitamin B could improve your mood and overall emotional well-being

Low energy Fatigue Memory issues Confusion Headaches Fogginess Moodiness Weakness Anemia Using these symptoms as a guide, you can determine when your vitamin B12 shot needs to be repeated

2014 May 5;6(5):1861-73