Also referred to as
SCD
Information
http://www.breakingtheviciouscycle.info/This is based on the book
Breaking The Vicious CycleIn a nutshell, it assumes that many disorders (including ASD/Autism) are (a result of|grossly influenced by) bacteria in the intestinal system. These bacteria live on artificial or refined sugars, starches, and some complex carbohydrates; therefore health can be generally improved by adjusting the diet to starve these bacteria. Once the bacteria are dead or substantially reduced, improvements in health may be realized.
There is a claim on the Autism One list that in this instance, the diet was only adhered to for 18 months; then a less rigid diet was adopted (the implication being, without a diet-related regression).
Personal Observation
It doesn't spike the BS-meter, however it appears to be at least peripherally involved with chelation (it talks about integrating the diet with chelation).