injection site for b12 shot A Retired RN About Vitamin Injections Vitamin C and B12 Injection

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

The 28-day window assumes consistent refrigeration between 3646F and protection from light exposure

Current concepts in the diagnosis of cobalamin deficiency

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The blue color comes from copper ions, and excessive copper exposure could potentially cause irritation or other issues