Good nutrition can help prevent disease andpromote health. Ther are six categories of nutrients that the body needs to acquire from food: protein, carbohydrates, fat, fibers, vitamins and minerals, and water. If you follow the healthy eating plate guidelines you will meet your nutritional needs. Unless you have malabsorption health issues like Celiac, IBD. In which case dietary supplements can be necessary. Supervised by your doctor to avoid supplement toxicity issues. If pn a restricted diet for the management of food intolerance or food allergies, it is best to get help from a dietician to ensure you are getting all your nutrient needs met.