B vitamins are essential for optimal health and numerous reactions in the body, including energy production, brain, liver and nerve cell function, and muscle function. The Center for Weight Loss Success injectable Lipo+B12 contains B-12 plus methionine, inositol, and choline (MIC). These last 3 substances help with fat mobilization for improved weight loss. It is the combination of the B12 and MIC which is thought to help with energy and weight loss.