Sundown Naturals Super Potency Sublingual B12 provides you with a high potency source of this essential B Vitamin in an easy to take quick-dissolving tablet. Just place one under your tongue for 30 seconds before swallowing, and enjoy the benefits B12 is known for - supporting heart and circulatory health, contributing to a healthy nervous system, and playing a role in energy metabolism.* B12 also aids in the normal development and the regeneration of red blood cells.