I tried all those special diets and they didn't help me, but a parasite cleanse called Humaworm really helped me massively and i highly suggest you do some reading over on their website. Sorted me out a treat. They also have a forum here on curezone that's pretty helpful.
Sibo stands for Small Intestine Bacterial Overgrowth.
Sibo is a type of parasite.
Took me a long time to figure that out.
Humaworm kills parasites.
If you search under my name on the "ask Humaworm" forum here on curezone, you will find many of my posts and the success i had.