what is a b12 injection good for 7 Benefits of Injections Health, Energy and Beauty Benefits of B12 Injections for

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Some people feel nausea, constipation, diarrhea, or fatigue as the dose increases

I recommend: at least 2,000 mcg (g) cyanocobalamin once each week, ideally as a chewable, sublingual, or liquid supplement taken on an empty stomach or at least 50 mcg daily of supplemental cyanocobalamin or a serving of B12-fortified foods three times a day, each containing at least 190 percent of the Daily Value listed on the nutrition facts label Those over 65 years of age should take at least 1,000 mcg (g) cyanocobalamin every day

Long-term reactions are still unclear