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[13] In a newly diagnosed vitamin B 12 -deficient patient, normally defined as when serum levels are less than 200 pg/ml, daily IM injections of hydroxocobalamin up to 1,000 g (1 mg) per day are given to replenish the body's depleted cobalamin stores

Many energy drinks, protein bars, and meal replacement shakes contain high doses of B12 (sometimes 2,000 to 5,000% of the Daily Value per serving)

Knowing the differences between these two can really affect how well your treatment works