Supplements Guide: Side Effects & Best Multivitamins

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Female doctor making injection to little boy

The Best Places to Give Vitamin B12 Injections

Published Jul,08 2011 | By Chris McDaniel

Injectable vitamin B12, or cyanocobalamin, is used to treat or prevent deficiencies in people who are unable to absorb the oral form from the intestines. Although vitamin B12 can be injected under the skin, the preferred method is the intramuscular route.