MRI contrast agents are a group of contrast media used to improve the visibility of internal body structures in magnetic resonance imaging (MRI).RI contrast agents are a group of contrast media used to improve the visibility of internal body structures in magnetic resonance imaging (MRI).
Nutrient-Dense Foods. Nutrient-dense foods contain high levels of nutrients, such as protein, carbohydrates, fats, vitamins and minerals, but with few calories. These foods provide the most bang for your nutritional buck. They are high-quality and generally are minimally processed.
Fiber. Potatoes also contain the second requirement for the label good carb.. They contain fiber. The USDA Nutrient Database lists a medium-sized potato with skin on as containing 3.8 grams of fiber, which is approximately 10 percent of the recommended daily intake.hoto Credit Dorling Kindersley/Dorling Kindersley RF/Getty Images. For a carbohydrate to be considered a good carb, it needs to provide vitamins and minerals in addition to the carbohydrate. Most importantly, a good carbohydrate needs to contain fiber.