Quick Vitamin B12 Energy Burst Micro Tablets go to work fast, bypassing the digestive system as they are quickly absorbed directly into the body under the tongue. Other forms of Vitamin B12 supplementation can result in a loss of as much as 50% of the Vitamin B12 potency in the high acid environment of the stomach. Our Quick Vitamin B12 Energy Burst formula with niacin, caffeine, stevia leaf extract and guarana seed is formulated and manufactured to provide a quick energy burst and the maximum essential nutrients for the support of the heart and cardiovascular system.*