Reading the book "Bounce" by Matthew Sayd has made me question my whole principal toward diet, this may surprise, because there is little or no mention of diet in the book. Previously, I have been following what is a "paleo diet" (my version at least, which is: personal examination, elimination, reintroduction of foods). After reading this book however, I have begun to question my own principals, perhaps the idea of diet or dieting itself is placebo, it's actually when one takes a positive interest in one's own health and makes positive steps, it's the belief, the "believing" that generates the changes in interior and exterior health.
The author uses Muhammad Ali and Jonathan Edwards (British author, sorry, triple jump world record in 1995) as particular examples in the sporting world, both had very strong but opposing religious beliefs, they both sighted their personal versions of "god" as having carried them forward, an absolute belief, to their individual absolute goals respectively. They can't both have been right about their image of what is "god", it was only the "belief" part that was the important, not the exact religion.
For me, I have always questioned religion and "blindly" following anything for that regard, so, dedicating myself to paleo diet too far could even alienate me from my own friends, I absolutely don't wish this.