Currently browsing posts about: Why-Calories-Count

I can hardly believe this, and had to laugh when I read all the articles last week about how worried the food industry is about the new obesity drugs.

Imagine: if the drugs really do reduce appetite and interest in food—horror of horrors—people might eat less.

Eating less, as I have pointed out repeatedly, is very bad for the food business.

In Food Politics, I explained how the fundamental purpose of  food companies is to get you to eat more food, not less.

Beginning in the early 1980s, food companies did a better job of creating an “eat more” food environment.

People responded to this environment by eating more calories—lots more—and way more than enough to account for the rising prevalence of overweight and obesity.  Evidence?   See my book with Mal Nesheim, Why Calories Count: From Science to Politics.

When I am at my most cynical, I ask this question: What industry might benefit if people ate more healthfully?

I am hard pressed to think of any—certainly not the food, diet, or diet-drug industries (Novo Nordisk, maker of the semaglutide drug, Wegovy, now makes more than the gross domestic product of Denmark).

The only exception I can think of is not-for-profit HMO’s like Kaiser Permanente, which do better if their patients are healthier (and have no excuse for not paying their workers better).

Anything that helps people eat less and more healthfully is bad news for the food industry, and especially for companies making ultra-processed junk food.

No wonder companies are worried.

Here’s my collection from last week (with thanks to Lisa Young and Michele Simon for making sure I saw these articles):

• Wall Street Journal: America’s Food Giants Confront the Ozempic Era
• Yahoo Finance: Ozempic Is Making People Buy Less Food, Walmart Says
• Bloomberg News: If Ozempic Leads People to Eat Less, Maker of Cheez-It Will Be Ready
• Yahoo Finance: Snack-maker Conagra may tweak portions as weight-loss drugs alter appetites
• Washington Post:  Food, clothing, airlines: Ozempic is coming for these industries and more
• Yahoo Finance: Surge in obesity drugs like Ozempic has pummeled big food stocks. Is it time to eat them up?
• Food Fix:  Why Ozempic makes Wall Street woozy
• PepsiCo: PepsiCo monitoring impact of weight loss drugs, but says early impact on sales is ‘negligible’

Kevin Hall at NIH has done a controlled diet study demonstrating that people who consume ultra-processed foods eat more calories—500 more a day (!)—and, therefore, gain weight.

Carlos Monteiro at the University of São Paulo and his colleagues explain how to identify ultra-processed foods.  

They also demonstrate that ultra-processed foods comprise nearly 60 percent of calorie intake.

No surprise.  Calories matter, as Mal Nesheim and I explained in our book Why Calories Count: From Science to Politics (and thanks Kevin for confirming what we wrote in that book).

The clear conclusions of this study have elicited a lot of attention.  Here’s my favorite from Francis Collins, the head of NIH and Kevin Hall’s boss, who also did a blog post:

Examples of media accounts (there were lots more)

• New York Times (this comes with pictures of the two different diets)
• Consumer Reports
• Mother Jones 
• Medical News Today
• NPR
• Center for Science in the Public Interest

I did a bunch of interviews about the sugar industry’s funding and manipulation of research this week (see the list at the bottom of the post).

I tried to point out that in the fuss over sugars vs. saturated fat, calories get forgotten.  They shouldn’t be.

The balance between fat and carbohydrate matters much less when calorie intake is balanced by physical activity.

The Atlantic notes that Americans eat and waste vast amounts of food, using USDA data on the amount of calories made available by the food supply.

I love the USDA’s “Food Availability (Per Capita) Data System.”  Here’s how to use it:

• Scroll all the way down to the bottom of the page to Nutrient Availability.
• Click on Nutrients.
• Download Excel Spreadsheet.
• Click on the worksheet, “Nutrients and other components of the US food supply.”  Have fun checking out the trends from 1909 to 2010.  We have available to us 4000 calories per day per capita.
• Click on the second worksheet, “US Food supply: Nutrients contributed from major food groups.”  Now you can see where the calories come from:  Grain products and fats and oils together account for more than 1800 of the 4000 calories in the food supply.  Add in sugars and sweeteners and you are up to 2500.  Meat, poultry, and fish brings it over 3000.

Hmmm.

This is why I co-authored a book on the topic: Why Calories Count: From Science to Politics.

Before my University Lecture at Syracuse University on Tuesday, I met with nutrition students who started a book club and were reading Why Calories Count.

Here they are with bookbags printed with the logo of this blog site.

Thanks so much.  It was an honor and pleasure to meet with you.

The New York Times front page today has a report of a long-term study at NIH of severe calorie restriction in Rhesus monkeys.  It found that calorie restriction did not extend the monkeys’ lifespan.

I’m not at all surprised.  My co-author and I reviewed the literature on calorie restriction for a chapter in our book, Why Calories Count.

The new study makes news because it contradicts a study done in Wisconsin showing that severe calorie restriction extends life.  Severe means 25% to 30% fewer calories per day that are needed to maintain normal body weight.  I’d call this a starvation diet.

An editorial accompanying the report of the study in Nature attributes the difference between the results of this NIH trial and the Wisconsin study to a difference in dietary composition, suggesting that calories differ in their effects.

Not necessarily.  The Wisconsin study allowed the control monkeys to eat a lot of junk food and they were fatter than normal.  The NIH study restricted calorie intake in its control monkeys so they maintained normal weight and were healthier.  This is the simplest explanation of the difference.

Studies in rats, mice, and many other animals show that calorie restriction extends life.

But what about primates?

Starvation can hardly be good for health.  It causes weight loss, of course, but also a host of physiological and psychological problems.  These were extensively documented in humans during World War II in Ancel Keys’ Starvation studies.

The relationship between BMI and human longevity has been examined in several recent studies, all of which show similar results: Longevity is best associated with BMIs in the range considered normal or slightly overweight.  Above that range—but also below it—mortality increases.  

Being underweight is associated with higher mortality.

A Canadian study provides this example:

And one from the National Cancer Institute provides another:

The bottom line?  Eat a healthy diet and balance calories to maintain a healthy weight within that range.

NYU did an interview for the Steinhardt School’s website:

USA Today’s Nanci Hellmich interviewed me and my co-author, Malden Nesheim, about Why Calories Count:

When it comes to calories, some people count them, others are confused by them and some just ignore them. Marion Nestle, a nutrition professor at New York University, and Malden Nesheim, professor emeritus of nutritional sciences at Cornell University, look at the topic in Why Calories Count: From Science to Politics. USA TODAY’s Nanci Hellmich talked to them about the new book.

Q: Why do women in general need fewer calories than men?

A: Women are smaller and generally have a higher body fat content than men. Fatty tissue needs less energy to maintain than does muscle mass. Pregnancy and breast-feeding increase women’s calorie needs.

Q: Why do some people have an easier time maintaining a healthy weight than others? How many calories are used by basal metabolism?

A: Genetics has plenty to do with body weight and some people seem to be able to eat vast amounts of food without gaining weight. About two-thirds the calories we need go for basal metabolism — the amount of energy needed to support basic body functions like breathing, blood circulation, kidney function, etc. The rest primarily supports physical activity. So if you want to lose weight, you have to eat less or move a lot more.

Q: Why does energy expenditure decline as much as 20% by age 50 and 30% by age 71 and older?

A: This, in our opinion, is one of life’s great tragedies. Basal metabolism drops with age and so does muscle mass. Lots of people are less physically active when they get older. Staying active does lots of good things for health and one of them is compensating for the decline in calorie needs.

Q: Are all calories created equal when it comes to weight loss?

A: If you lock people in a metabolic ward and feed them the same number of calories in reduced-calorie diets that vary in fat and carbohydrates (all measured), you can show that they lose weight at the same rate regardless of diet composition. The number of calories determines how fast they lose, nothing else.

In the real world, some people lose weight faster on low-carbohydrate, high-fat diets, such as the Atkins diet, especially at the beginning when they excrete so much water. Some people find that low-carbohydrate diets make it easier to reduce calories and stay satiated. And it’s always a good idea to cut back on desserts and sodas.

Q: Do excess calories make some people gain weight faster than others?

A: Here’s where genetics comes in. In controlled studies of overfeeding, everyone gains weight when they eat more calories than they expend, but at different rates. Some people can overeat and gain only a little weight — growing teenage boys are a good example. They may spontaneously increase their physical activity to burn off excess calories. Other people easily store more of the extra calories as fat.

Q: What is your best advice to people who want to lose weight?

A. Our mantra is: Get organized; eat less; eat better; move more; get political. By get political, we mean work to change the food environment to one that makes it easier to eat healthfully: Support labeling laws and nutrition education; stop advertising to children; support agricultural policies that encourage consumption of fruits and vegetables, local food systems, and environments that encourage physical activity.

Q: What do calories have to do with politics?

A: How much food people eat — and whether they are malnourished or overweight — is affected by income, education, and, therefore, the political system. Many companies and vested-interest groups have a stake in how calories are marketed, perceived, labeled, and promoted, not least because eating less is bad for business.

Efforts to do something about obesity in adults and children focus on eating less or on eating better, meaning more fruits, vegetables, and grains but consuming less of sodas, fast food, snacks, and other highly profitable items.

Such matters as soda taxes, listing calories on food labels or menu boards, or campaigns to promote smaller portions are all political responses to concerns about calorie consumption. For years, consumer groups have pushed for calorie and nutrition labeling on alcoholic beverages, but the Treasury Department (not the FDA) regulates such things and responds to the wishes of the industry.

Jane Brody, Personal Health, March 20: Calories are everywhere yet hard to track

The human body has a very complex and redundant system to make sure the brain gets the sugar calories it needs to function, Dr. Nestle and Dr. Nesheim explain in their book. At least 100 different hormones, enzymes and other chemicals — with more likely to be discovered — act to regulate appetite and to assure that people eat enough to maintain brain function.

But it is these very systems that go into overdrive during starvation (translation: a reduced-calorie diet), making it so difficult for people to lose weight.

Mark Bittman, Opinionator, March 21: Is a calorie a calorie?

Ultimately, the calorie is political: marketing affects instinct, and Nestle and Nesheim really shine in their analysis in this realm. (Their slogan: “Get organized. Eat less. Eat better. Move more. Get political.”)

When I asked Nestle what she would do, given that people in the United States were obviously eating too many calories and that the resulting excess weight was costing all of us life years and money, she answered quickly: “We need a farm bill that’s designed from top to bottom to support healthier diets, one that supports growing fruits and vegetables and making them cheaper.

We need to fix school lunches so they’re based on fresh foods, and fix food assistance programs so people have greater access to healthier foods.”