As a natural healthcare practitioner, I often refer to several textbooks to update and review for the benefit of my patients. I have come to rely on Dr. Columbu's knowledge as it applies to athletes. Yet, there is a point to which all persons can benefit from just a little of his principles. Seldom will you find a book recommending that the specific enzyme-containing foods required for proper breakdown and assimilation of other vital substances. As to the comment that the information on the macronutrients and micronutrients being outdated and nothing new, I must respond by replying that I do not often encounter persons who have a working knowledge of what nutrients are responsible for certain functions and the consequences of deficiencies. And the information he provides is just as useful today as it was in the book's first printing. We could all use a bit of a refresher course from time to time on basic nutrition. Glad to see Dr. Columbu reiterating the value of such information.