"In Defense of Food" By Michael Pollan (The Penguin Press)

Food isn't what it once was. Actually, much of what we eat today may not be food at all. That is the main lesson drawn from Michael Pollan's new book, "In Defense of Food," a meticulously researched, self-described "Eater's Manifesto."

The book, which is very much a companion piece to Pollan's earlier book, "The Omnivore's Dilemma," continues his argument that in recent decades, we have shifted from the traditional diets of our ancestors to what he calls the "western diet" - industrialized food, reconstituted, repackaged and redefined to conform with the latest whims of nutritional science.

It is a shift that Pollan says has set us adrift in a "treacherous food environment," bereft of "cultural tools to guide us through it." All this has brought us increased obesity, high blood pressure and diabetes along with the troubling paradox that "the more we worry about nutrition the less healthy we become."

While "The Omnivore's Dilemma," was a dense tome, incorporating history and science with contemporary culinary culture, Pollan's latest effort is a slim volume dispensing advice much of which appears to have been gleaned from reporting the earlier book.

In "The Omnivore's Dilemma," he just laid out the facts and let the reader ponder what to do about them. He described the feedlots where cattle up to their knees in their own manure and explained how industrialized farmers have sacrificed nutritional value in the quest of growing crop yields and how much organic foods has strayed so far from its 1960s counterculture roots that they are today little different from their industrialized counterparts.

"In Defense of Food" tries to answer many of the troubling questions raised by the earlier book. The answer is simple. Pollan boils it down to just seven words: "Eat food. Not too much. Mostly plants." It is advice that is not that different from what the United States Department of Agriculture said in its 2005 Dietary Guidelines.

Pollan argues that the industrialization of our food chain has not only robbed us of all sorts of micro-nutrients and ruined the environment, it has also left us adrift in a confusing maze of fad diets and conflicting health claims.

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