Experience the benefits of optimal vitamin B12 levels with 21ST B12, a high-potency sublingual supplement designed for maximum absorption. Each bottle contains 110 tablets of 5000mcg B12, ideal for individuals with deficiency symptoms such as fatigue, weakness, or neurological issues. Sublingual administration ensures rapid absorption directly into the bloodstream, bypassing the digestive system for superior efficacy. Supports energy production, red blood cell formation, and cognitive function.