But it that optimal?  I find I get better results and feel better from cutting out pizza, ice cream or candy completely.  Having a couple of slices of pizza once a month is to me like telling a heroin addict to have a hit once a month then expecting them to stick to it.

Acually, an emphasis on super clean eating is one of the key reasons diets fail.  It is important to include some favorites, that is if the individual can control their consumption, to increase the chances of adherence.  We can once again draw an analogy with exercise e.g. super intense exercises that you hate often lead to dropout, or termination of training.  It is imporant to find some  exercises that trainees enjoy, although with some that is impossible.  And if your an athlete their are some activities you need to do, like or dislike. 

Super Clean Eating camp much like the Metabolic Advantage Camp will believe what they would like, evidence means little.  I know trainers who still insist that eating healthy all the time is a must.  Even though the phrase eating healthy is a misnomer, and what’s healthy for one many not be healthy for another, and being healthy depends on numerous facotrs, oh well time to move on. 
In conclusion, “There is a fine line you can draw sometimes when you are on your journey to changing your body composition. You want to make sure you cover all your nutritional bases but you don’t want to develop a phobia or a disorder.” One more thing you can throw the “90% rule” out the door it’s no longer in style.