The spear-like green contains high levels of inulin, about 15g per serving. Inulin is an indigestible fiber that acts as a prebiotic, a type of nutrient that nourishes the friendly bacteria living in your GI tract, says Alissa Rumsey, R.D., spokesperson for the American Academy of Nutrition and Dietetics. Asparagus also has solid B vitamin levels and inflammation-fighting antioxidants. Like a lot of stalky, crunchy veggies, asparagus has to potential to make you gassy. If you’re prone to digestive distress, start with a few spears.