Vitamin B2), folic acid (Vitamin B9), and niacinamide (Vitamin B3) are essential vitamins that play various roles in the body's metabolism, energy production, and cell growth. Lactic acid bacillus is a probiotic bacterium that helps maintain a healthy balance of gut bacteria and may support digestive health. These ingredients are often combined into a single tablet to provide a comprehensive supplement for overall health and well-being.