Bananas and apples(especially bananas) are loaded with sugar. I suggest avoiding them if you have a candida problem. Apples and bananas are also relatively low in vitamins and minerals when compared to some other fruits. It may be a good idea to avoid all fruit, and eat extra vegetables instead. You don't need bananas for potassium. All vegetables and fruits, as well as milk and yogurt are loaded with potassium. If you want to eat fruit, you could eat strawberries or cantaloupe, which are much lower in sugar than bananas or apples.