If you experience fatigue, light headedness, exhaustion, and brain fog after meals, no drug is going to correct the true underlying problem. If you take a real, whole and complete B-vitamin complex about 4-6 months and nourish their body with real food as opposed to fast food and foods with unnatural additives, you will be more energetic, vibrant and productive. The B-vitamins from the store are derivatives of coal tar. The B’s I use are food based products that can restore the body to optimal health.