A good, healthy diet is essential if you want to maintain a healthy weight, but it can also help to build your immune system, which is great for your overall health. Preventive measures, such as eating low-calorie, nutritional foods, can give your immune system the strength it needs to ward off illnesses and chronic disease instead of focusing on the damage that unhealthy foods can cause. During a consultation with double board-certified physician Dr. Raj Singh at HEALOR Prim