b12 injections subcutaneous or im Shots at Home: How, Where & How Often to Inject Yourself Sublingual B12 vs. B12 Injections:
Description
Cyanocobalamin, by contrast, requires enzymatic conversion in the liver and tissues to become active

J Am Coll Cardiol
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B12 supplements may reduce fatigue and improve endurance, making them popular among athletes and individuals with busy lifestyles
Very common (more than 1 in 10): mild pain, redness, or swelling at injection site usually fades in a day

Anyone with a high toxic body burden metals, chemicals, mold, etc
