Calories - too few or too many - are the source of health problems affecting billions of people in today's globalized world. This title explains in clear and accessible language what calories are and how they work, both biologically and politically.

"If you want to understand what's wrong with our eating habits, you must understand the central role that calories play. Nestle and Nesheim are two of the America's finest nutritionists–and this book explains, clearly and succinctly, why calories count. It is essential reading not only for people interested in food policy, but for everyone who wants to eat well and be well." –Eric Schlosser, author of Fast Food Nation: The Dark Side of the All-American Meal

"This superbly well-researched and scientifically sound book makes it clear how today’s food environment often overrides physiological regulatory controls of body weight. Why Calories Count is essential reading for anyone who wants to understand why so much about food choice lies in the hands of food marketers whose goal is to sell more products, not necessarily in the interests of public health." –Dr. David Kessler, author of The End of Overeating: Taking Control of the Insatiable American Appetite

“We need to understand what ‘empty calories’ are, so that we can feed our children food that is truly nourishing. On this topic, there is no better teacher than Marion Nestle, who writes with meticulousness, clarity and grace.” –Alice Waters, author of The Art of Simple Food: Notes, Lessons, and Recipes from a Delicious Revolution

"Thank god authorities like Nestle and Nesheim have teamed up to give us an epic view of a calorie: what it is, where it came from, what it means, how and why we count them. Thank god they’ve managed to decode nutritional science into a commonsense language we can all understand. And thank god they’ve put calories in their place in a wider cultural and political context to help us think meaningfully about the food our lives depend upon. I’m grateful." –Betty Fussell, author of Raising Steaks: The Life & Times of American Beef

“Calories. We all talk about them—many are even obsessed with them—but what do we really know about them? Not much. Marion Nestle and Malden Nesheim’s latest book changes all that, pulling back the curtain on calories and helping us understand them in a whole new light. You’ll never look at a 100-calorie pack of corporate cookies the same way again.” –Anna Lappé, author of Diet for a Hot Planet: The Climate Crisis at the End of Your Fork and What You Can Do About It



Calories - too few or too many - are the source of health problems affecting billions of people in today's globalized world. Although calories are essential to human health and survival, they cannot be seen, smelled, or tasted. They are also hard to understand. In Why Calories Count, Marion Nestle and Malden Nesheim explain in clear and accessible language what calories are and how they work, both biologically and politically. As they take readers through the issues that are fundamental to our understanding of diet and food, weight gain, loss, and obesity, Nestle and Nesheim sort through a great deal of the misinformation put forth by food manufacturers and diet program promoters. They elucidate the political stakes and show how federal and corporate policies have come together to create an "eat more" environment. Finally, having armed readers with the necessary information to interpret food labels, evaluate diet claims, and understand evidence as presented in popular media, the authors offer some candid advice: get organized; eat less; eat better; move more; and get political.