My nutritionist mentioned it would take 3-5 cans of Threelac. I misunderstood in the beginning that I had to eliminate ALL products made of wheat flour, ALL sugar, and most fruits. I only cut back. Regardless, I have noticed that the Threelac is working for me. When I eat something that feeds the parasite, my stomach becomes bloated and I have an outbreak of white sores inside my mouth. So, I have a good gauge. I've learned to be more conscious of what I'm eating. It was extremely difficult to change my diet - I'm a carb addict. However, I look forward to being free of the parasite for good. I think I've lived with it for a long time.