Pure Lab Vitamins? BioActive B-12 provides 5000mcg of methylcobalamin per tablet. Taken sublingual (under the tongue) it?s delivered directly into the bloodstream, making it a more effective, non-invasive and direct way to replenish vitamin B-12 levels. The product is using a natural Strawberry / Kiwi flavour and is sweetened using low amounts of mannitol and xylitol, avoiding the use of sugars and artificial chemical sweeteners. Methylcobalamin is the biologically-active form of vitamin B-12. Absorption of this essential vitamin depends on adequate production of intrinsic factor, secreted by a healthy stomach. However, neither dietary sources nor ordinary supplements containing vitamin B-12 will help an individual with low / no intrinsic factor secretion. Again, low stomach acid secretion and some auto-immune disorders are just some of the factors that can reduce the secretion of this special substance. Recommended Use: Helps the body to metabolize carbohydrates, proteins and fats. Helps to form red blood cells. Recommended Dose: Adults: 1 Tablet(s) 1 time(s) per day. Place 1 Tablet under your tongue and let dissolve.