A diet high in saturated fat is a major contributor to high cholesterol and heart disease. Kumquats contain less than a gram of fat per 100 gram serving, and they are also cholesterol free. Kumquats taste best if they gently rolled or squeezed between the fingers before being eaten. This process unifies sweet ingredients in its thin rind with that of tart pulp. Eat kumquats as you would eat grapes or olives with the peel.