by Marion Nestle

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Jan 11 2008

What’s the deal on saturated fat?

A reader, “rj,” sends a link to an article in Men’s Health (“What if bad fat isn’t so bad”), and asks about: “The supposed inconclusive evidence for sat fat being the culprit in atherosclerosis. Personally, I couldn’t find any credentials of the author but nevertheless would be much interested in your thoughts on the matter.”

My thoughts: As I keep saying, nutrition science is complicated and this article, by an excellent science journalist, is the latest in a series by excellent science journalists (see, for example, the recent books by Gary Taubes and Michael Pollan) to point out the inconsistencies in data on saturated fat and heart disease risk. Let me make several quick points: (1) All fats–no exceptions–are mixtures of saturated, unsaturated, and polyunsaturated fatty acids (2) Saturated fats occur in greater proportions in animal fats–meat and dairy foods, (3) Some epidemiologic evidence–but not all–suggests that people who eat a lot of meat and dairy foods have a higher risk of heart disease than people who eat a lot of fruit and vegetables (this is correlation, not causation), (4) The same clinical studies that show how trans fats do bad things to blood cholesterol levels also show that saturated fat does too, although not as much (But: people take in a lot more saturated fat than trans fat), and (5) Saturated fat is a single nutrient and the studies reviewed and discussed by the journalists take saturated fat out of its dietary context.

Out-of-context studies of single nutrients are exceedingly difficult to interpret. At the moment, today’s dietary (not single nutrient) advice is the same as it has been for the last fifty years. As I put it in What to Eat, “Eat less, move more, eat plenty of fruits and vegetables, and don’t eat too much junk food.” Michael Pollan gives exactly the same advice: “Eat food. Not too much. Mostly plants.” Do this, and you really don’t need to give a thought to single nutrients.

I discuss the politics of diet and disease recommendations in my book, Food Politics (now out in a new, expanded edition), and this particular question in “Ask Marion” on Eating Liberally.

Does this help at all? Thanks for asking.

Jan 3 2008

Michael Pollan’s new book

On Eating Liberally’s “Let’s Ask Marion” this week, I discuss Michael Pollan’s new book, In Defense of Food, his gift to the new year.  Enjoy!

Nov 7 2007

This week at Eating Liberally: what about cooking?

KAT’s question this week: Who’s really to blame for our convenience food-dominated diet? Was the I Hate to Cook Book a progressive, pre-Friedan feminist manifesto, or a culinary cop-out?

See my response at Eating Liberally.

Oct 9 2007

Sorting out low-fat vs. low-carbohydrate

Several people, among them Kerry Trueman of Eating Liberally, asked my opinion of John Tierney’s column about Gary Taubes’ new book, Good Calories Bad Calories, in today’s New York Times. Taubes’ book arrived while I was in India and I can’t really comment on it until I have had a chance to read it. I gather from Tierney’s piece and Gina Kolata’s review of it on Sunday that it comes down hard on carbohydrates.

I continue to be impressed by how difficult it is to separate the health effects of fat, carbohydrate, and protein from the calories they provide, the foods that contain them, the diets as a whole, or the rest of the lifestyle that goes along with the diet. Finding out what people eat is hard to do. Determining the health effects of dietary factors or patterns is even harder since humans make such awful experimental animals. Plenty of things about human nutrition are reasonably well established–the basic nutrients that are required and the amounts that prevent deficiency diseases, for example. But it is much trickier to figure out the effects of nutrients on chronic diseases that are also affected by activity levels, cigarette smoking, alcohol use, and social factors such as poverty, stress, and lack of control. So I can’t help but be skeptical of journalists who think they have answers to questions that scientists have been grappling with for years.

In a situation in which questions remain, is it better to say nothing or to give the best advice possible based on existing knowledge? Intelligent people may differ on this point but I am convinced that people really want to know what diet is best for their health and want help making food choices. What seems amazing to me is that despite decades of arguments over fat v. carbohydrate, basic dietary advice for preventing chronic diseases hasn’t changed in 50 years. I summarize this advice in What to Eat as don’t eat too much (eat less, move more); eat plenty of fruits, vegetables, and whole grains; and don’t eat too much junk food. This seems like a pretty good approach backed up by plenty of research.

Oh, and the calorie question. It’s not that people are overeating 50 to 100 calories a day (the amount in one or two Oreo cookies) and gaining weight. Most bodies can easily compensate for small differences in caloric intake and output. But, as I hear from pediatricians all the time, kids these days are consuming hundreds of calories more than they need, and sometimes thousands. Metabolism–in kids or adults–just can’t handle that level of overload. In that situation, carbohydrates may be harder to handle than fats, but both will end up in the body as fat if those calories aren’t used up in physical activity.

Fortunately, my precepts leave plenty of room for enjoying delicious food, and aren’t we lucky to have so much around.

Sep 19 2007

Breakfast?

My son Charles, who lives in Los Angeles, sends this interesting site on which a photographer, Jon Huck I presume, has taken pictures of people posed with what they eat for breakfast. The breakfast project is along the lines of the spectacular books, Hungry Planet among them, done by Peter Menzel and Faith D’Aluisio, and for which I wrote the introduction. These are fascinating takes on what people really eat (as opposed to what they tell nutritionists). Enjoy!

Update: Turns out you can join this project. Take a camera with you to breakfast and send the results to Jon Huck. He will post your entry.

May 29 2007

At last, this site begins

I have been on sabbatical from NYU this semester and am just back from weeks of travel on the west coast to give talks about any number of the food issues I discuss in What to Eat. Everywhere I go, I see how the issues are converging on food as a new social movement. This movement is not organized in any visible way and is composed of many separate movements that have developed independently, among them:

  • The good, clean, fair food movement
  • The Slow Food movement
  • The farm animal welfare movement
  • The community food security movement
  • The organic foods movement
  • The locally grown food movement
  • The anti-marketing-foods-to kids movement, and
  • The school food movement

Separately and together, these movements aim to make all aspects of our food system—from production to consumption–healthier for people and the planet. They derive from the best aspects of the long tradition of American grassroots democracy–of the people, by the people, for the people.

I always try to leave time for questions after my talks, and people often ask me what they could read to learn more about the food movement(s). As it happens, I recently wrote an answer to that question for Publishers Weekly, but the folks there chose not to use it. So here it is.

Three Books That Made a (Food) Revolution*

Once upon a time, most people considered food too common—too quotidian–to be taken seriously as a field of study, let alone as an agent of social change. University departments routinely dissuaded doctoral students and untenured colleagues from wasting time on anything that seemed so trivial as the role of food in culture or commerce. Yes, The Jungle, Upton Sinclair’s muckraking account of the horrors of the Chicago stockyards, spurred the U.S. government to pass food safety laws, but that book was published in 1906 and even though it has been in print ever since, seems like ancient history. A century later, hardly anyone could imagine that books about food would spark a social movement.

But they have. Three books from quite separate genres—cookery, scholarship, and journalism—created a revolution in the way Americans consume, think about, and produce food. These books catapulted food into the mainstream of modern culture and advocacy for social change, and opened doors for scholars as well as journalists to write about the political, commercial, and health aspects of food in modern society. All three of these books were best sellers in their respective fields, still do well, and are widely read and used.

My vote for book #1 goes to Mastering the Art of French Cooking (Knopf, 1961). This book thoroughly overturned my generation’s ideas about food. My own treasured copy is yellowed and spattered from early experiments with bouillabaisse (pretty terrific), soufflés (tricky but worth it) and Hollandaise (never mind). As Laura Shapiro makes clear in her splendid new Julia Child (Penguin Lives series, Viking, 2007), Mastering was a monumental work of research that transformed the entire cookbook genre from being considered “mere” to taking its place as a respected cultural indicator worthy of scholarly investigation and careful preservation. My institution, New York University, now houses more than 20,000 cookbooks and other books about food in its Fales Special Collections Library, where any researcher can peruse them by appointment.

But Mastering was revolutionary in another way. It made American cooks realize how disadvantaged they were when it came to obtaining foods of the quality available in France. Enter, Alice Waters. Her insistence on using nothing but fresh, seasonal ingredients in her Berkeley restaurant, Chez Panisse exposed the inability of our industrialized agricultural system to provide food of the quality she demanded. That how food is produced determines how food tastes on the table is the central theme of the Chez Panisse cookbooks. It also is the rationale for contemporary accounts of the Alice Waters phenomenon such as David Kamp’sThe United States of Arugula (Broadway, 2006) and Thomas McNamee’s Alice Waters and Chez Panisse (Penguin, 2007).

Book #2 is Sidney Mintz’s Sweetness and Power: The Place of Sugar in Modern History (Viking, 1985). This book laid the groundwork for the new academic field of Food Studies. Mintz, an anthropologist, used the cultural history of sugar as an entry point into the analysis of social problems such as the plight of the working classes during the industrial revolution and the development of slavery as an institution. By linking something you might put in tea to the development of major political institutions, Sweetness and Power proved that food was not only a suitable topic for research in the humanities and social sciences, but could make social issues accessible to a wider range of readers. This made it possible to construct academic programs focused on food such as those at Boston University (Gastronomy) and New York University (Food Studies), and at the University of Gastronomy in Bra, Italy.

Book #3 has to be the remarkable best seller, Fast Food Nation (Houghton Mifflin, 2001), the journalist Eric Schlosser’s exposé of the “dark side” of hamburgers and French fries—how the way we produce fast food not only is bad for our health but also damages our economy, workforce, and environment. This book—now a classic–reached a huge audience, continues to be widely assigned on college campuses, and turned masses of readers into food advocates eager to change the current food system into one that is better for everyone, producers as well as eaters.

These three encouraged a new generation of books that have done wonders to promote food advocacy. Michael Pollan’s riveting and engaging Omnivore’s Dilemma (Penguin, 2006) presents a compelling case for transforming our food system into one that is a lot more rational and healthier. Peter Singer and Jim Mason’s The Way We Eat (Rodale, 2006), argues that raising farm animals more humanely will be better for us as well as for cows, chickens, and pigs. That our government’s agricultural policies need a serious overhaul is the point of Dan Imhoff’s Food Fight (University of California Press, 2007). Michele Simon’s Appetite for Profit (Nation Books, 2006) is a how-to manual for opposing the marketing of junk food to children, and Ann Cooper and Lisa Holmes’ Lunch Lessons (Collins, 2006) calls for a revolution in the school lunchroom. Such books provide much cause for optimism that the food system will change, much for the better, and soon.

I would like to think that my own books—Food Politics (University of California Press, 2002), Safe Food (University of California Press, 2003), and now What to Eat (North Point Press, 2006) have contributed to this movement, although I must leave the assessment of their impact to others. But I am proud to be part of this food revolution, which holds so much promise for making our world a better place as well as for improving what we eat for dinner. Pick the issue you most care about and join the movement!

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*I borrowed the title of this piece from Bertram Wolfe’sThree Who Made a Revolution, a political biography of the founders of the 1917 Russian Revolution–Lenin, Trotsky, and Stalin. First published in 1948, the book is still in print (Cooper Square, 2001). I list other books I especially like at “10 Books to Read on Food” on Amazon’s Grownup School* site.

And note that Barbara Jo’s Books to Cooks (Vancouver) website lists food books for the socially conscious.

*The site is no longer active, alas, and I can’t find the list.  Try this.