Some animal studies showed that using diets including soluble fiber (oat bran) helped eliminate the C-diff infection sooner than a diet with insoluble fiber (wheat bran). Foods high in soluble fiber include: oats and oat bran, oatmeal, beans, peas, carrots, barley, citrus fruits, strawberries and apple pulp.
Similarly, it is easier for oxygen to gain 2 electrons instead of loosing 6 electrons: Oxygen Ion. The two gained electrons (purple dots) means that this oxygen ion has 10 electrons (-10 charge) and only 8 protons (+8 charge), giving the ion a net charge of -2. Symbolically, we can represent this oxygen ion as O -2.
In carbon dioxide each oxygen shares four electrons with the central carbon, two (shown in red) from the oxygen itself and two (shown in black) from the carbon. All four of these electrons are counted in both the carbon octet and the oxygen octet.