Is Dr. Perlmutter, author of Grain Brain, on the right track with his diet approach?

This author and perspective are in alignment, in general, with a much better nutritional approach than has been embraced and recommended heretofore by government bodies and conventional wisdom in the medical community. The advent of greater depth of understanding of the role of fat in the diet is a revelation indeed after many decades of disinformation, faulty thinking, and manipulation of thought and recommendation principles embraced so unwittingly by the nutritional community to accept supposition in lieu of actual research, and conjecture in place of solid evidence. The data are clearly in, with respect to the travesty of centering diet on carbohydrate as a source of nutrition. It is very destructive in many respects, as you well know, and has been documented carefully through the growing body of research looking a second time at the role of protein, fat, and carbohydrate in the diet with respect to varying ratios, so this work is an improvement compared to the diets of old. It may not be ideal for all, but is a sound starting point—one can adapt it knowing greater detail about the fundamental research if people take the time and trouble to explore a bit on their own and make their own conclusions. Keep in mind that even though this is a physician author, he is subject to much oversight and criticism by his peers and may be influenced accordingly to constrain things and keep them a bit closer to conventional thinking than might be ideal, but nonetheless, this is a great improvement over prior practice.