For years and years, many people and most doctors kept saying that the SCD diet program, which states that CD is caused by an out of balance of bacteria in the gut , was nothing more just another scam diet and had no basis for working. The medical community kept saying that diet and bacteria out of balance have nothing to do with CD or remission, and drugs are the only solution to control CD.
Thirty years ago the book "breaking the vicious cycle" came out stating that you can put CD into remission by diet change alone because CD was caused by an out of balance of bacteria in the gut, and by changing your diet to a "no processed food" , "low carb" and "zero sugar" diet, you can kill off the bad bacteria by depriving them of the sugar and carbs they feed on. Then by eating home made yogurt, you can repopulate you gut with new good bacteria which reduces inflammation.
Now here is another study that shows how this theory of bacteria out of balance seems to be not so far out as once thought.
http://www.foxnews.com/health/2014/03/13/crohn-disease-bacterial-imbalance-may-play-role/?intcmp=latestnews
I have been in complete remission for 7 years after getting on the scd diet.