* The refined yeast powder in ThreeLac is a brewers yeast, which is a good yeast. It is a necessary food source to keep the ThreeLac bacteria alive until it reaches the yeast in your body. The yeast and the lemon contain naturally-occurring sugars, not like the refined sugar we are commonly familiar with. By FDA regulation all ingredients must be listed on the label. The natural sugars in the product will not cause the candida yeast to grow. The good bacteria in ThreeLac are able to survive the stomach acids (due to their micro-processing) and enter the intestinal tract in large numbers (80 to 90 percent), where they can effectively destroy your candida yeast.