I have been prescribing Three Lac to patients for a long time. It is my understanding that this product should be used for only 3 weeks and not indefinitely. Depending upon how bad the candida is...dictates 2-3 packets per day of three-lac. I have the patient do the spit test to show them that they have candida. After 3 weeks the spit test shows negative and the candida is gone. One must take the proper minerals so that the craving for Sugar is gone and the candida does not return. This is a 3 week program...and not a permanent situation.