I think that vastly depends on the person, what you eat, how fast you can heal, how well ur lymphatic system works, how "damaged" you are and so forth. Impossible to say exactly, but I think a couple of months, to half a year to a year for sure. Mine was pretty bad could only eat 2 types of meat and I think 6 types of veggies, my gut was so fdk, but things are going uphill since on carnivore, but I still need to find certain answers. Once you have all that in place it will go much faster.