Anytime we blow anything, we just have to start again, never ever give up. I’m half way through Dr. Hymen’s book and I have not read anything yet about what to do if you blow it. However, I’m sure he would say one day of blowing it is not going to completely distroy anything, just keep going. However he did give an example of someone who went back to eating gluten, felt sluggish again and then went right back on the program. Just don’t give up!