Normally, vitamin B12 is easily attained from foods like fish, meat, poultry, eggs, and milk. But if you're a vegetarian or are unable to absorb B12 from food, you're likely not getting the amount you need, which can leave you feeling fatigued. While vitamin B12 plays a critical role in the process of energy production, it is crucial to homocysteine metabolism and nervous system function, too. This delicious chewable tablet features the preferred form of B12 - methylcobalamin - that doesn't need to be converted by the body. That means it starts working fast, and provides real energy support you will notice right away.