GNC Vitamin B-12 5000 mcgGNC Vitamin B 12 5000 mcg Each B 12 5000 fast dissolving lozenge dissolves quickly to facilitate optimal absorption. Vitamin B 12 is essential for metabolism, energy production and red blood cells. B 12 and folate play an essential role in the maintenance of normal homocysteine levels important for cardiovascular health. Product Features: Quick dissolving to facilitate absorption Essential for carbohydrate metabolism & energy production* Sugar Free