Still taking vitamin B12 injections? Move over shot. A pill may be just as good. Dr. Leslie Greenberg's Blog Vitamin B12 (cyanocobalamin): Benefits, Side Effects, Dosage & More GoodRx B12 Injections vs. Oral Supplements: Which Works Better? B12 shots versus a pill , Vitamin B12 injections are more effective than pills for quicker onset and better absorption., Benefits, Vitamin B12 is an essential water soluble nutrient vital for many Did you know that only 30% of the vitamins & supplements swallowed in pill form are absorbed by the body. Vitamin injections are superior for severe, immediate deficiencies as they bypass