10% Free Vitamin Supplement Hi-Potency Promotes Tissue Growth & Maintenance and is Essential for Red Blood Cell Formation 21st Century...for a Healthier Future Laboratory Tested - Guaranteed Quality 21st Century Hi-Potency Sublingual Vitamin B-12 (Cyanocobalamin) promotes maintenance and growth of tissue and is essential for red blood cell formation. Sublingual release vitamins quickly release nutrients into the blood stream from under the tongue bypassing the digestive system.