This program supports the body's G.I. tract healing abilities. Microvillus turn over/grow back frequently as long as they are not being insulted with foods and other forms of inflammation. You should be able to restore much of your microbiome after years of damage from undiagnosed Celiac disease, but it will take further work than just 10 weeks to restore it 100%. In the case of Celiac, the transition and maintenance plan are necessary for continued healing.