Serious problems with digestion. The usual cause for Candida is an imbalance in the flora of your gut. Your stomach usually contains beneficial bacteria, but when these are killed off by antibiotics or by a sustained and concentrated intake of sugar, Candida dominates over all the other strains and completely imbalances the flora of the gut. When this happens, digestion is inevitably affected. With the beneficial bacteria dominated by Candida, you will find that your body has considerable difficulty dealing with starches and certain kinds of sugar and that it is impossible for you to digest fiber.