Vitamin B12 helps to improve energy levels, boost metabolism, help burn fat and aid in deficiency. Vitamin B12 can help boost your body’s energy levels by preventing fatigue, helping you to lose weight and also by lowering the risk of heart disease and other serious health concerns. It’s also essential for the health of your skin, hair and nails. Its other benefits include boosting your brainpower by slowing down memory loss, alleviating anxiety and aiding sleep.