Recommended by the Children's Development Design Institute, I purchased it on Amazon. It's easy to read. I also became healthy through nutritional therapy and molecular nutrition. Supplements are effective, but the author claims to have improved their own illness and their family's developmental disabilities through diet alone. "The Secret to a 180-Degree Improvement in My Health: What I Finally Understood After 15 Years of Suffering from Fatigue and Poor Health" Author: Kei