Currently browsing posts about: Obesity

At the insistence of Jerry Mande, I watched the meeting of the President’s Council of Advisors on Science and Technology (PCAST) to learn about the Federal Vision for Advancing Nutrition Science in the United States.

This Vision derives from last year’s White House Conference on Hunger, Nutrition, and Health and its pillar on enhancing nutrition research.

Cathie Woteki, who introduced the report, made a forceful case for the importance of chronic disease prevention.  Her committee was shocked  that the majority of Americans are overweight or obese, and at a cost of $500 billion annually.  She pointed out the lack of focus and coordination of 200 existing programs that ought to be addressing this issue.

The conclusion: not enough research on chronic disease and more funding needed.

No question about that.  Yes, we need more nutrition research and more funding for it.  A lot more.

But the White House request for the Office of Nutrition Research is only $1.3 million (see p. 26).  Surely this  is some kind of joke?  It’s hardly even a rounding error in federal terms.

As for the PCAST report’s efforts needed:  That’s all?

Yes we can use more data and research on personal eating habits and individual behavior, but what about the food environment?

Maybe PCAST is under political constrainsts but this sure does feel like a lost opportunity.

The report —as yet unpublished—appears to say nothing about:

• The effects of ultra-processed foods on individual food choices and weight. (the word “ultra-processed” was not mentioned)
• The need to change the food environment to make it easier and less expensive for individuals to make healthier food choices.
• Policies to requirie food companies to produce healthier foods and reduce serving sizes.
• Policies to stop the food industry from marketing ultra-processed foods to kids.
• Programs to achieve the existing 2030 health objectives to prevent obesity and chronic disease (these were not mentioned).

The committee said it consulted widely to produce this report.  Not widely enough, I’d say.

Compare this to what the UK House of Lords is doing in its hearings on  Food, Diet and Obesity.  Take a look at who they are listening to.

If the PCAST committee talked to any of these people, their comments are not showing up.

PCAST has a real opportunity here to push for a strong research and policy agenda to address obesity and its related chronic diseases.

What kind? Here are my suggestions.

Today I’m participating on a panel discussion on Ozempic at 12:30 EDT.  See announcement to the right; register for it here. 

I watched the Oprah special on the obesity drugs.

Its messages:

• Obesity is a disease, requiring treatment.
• These drugs offer treatment.
• The drugs are effective; side effects are minimal.
• Yes they are expensive and therefore, promote inequality; therefore, the government should pay for them.

The program was a one-hour, prime-time commercial for the drugs.

The physicians who testified on their behalf consult for the drug companies.

The program has already had an effect.  cause the FDA says semaglutide helps prevent heart attacks, strokes, and deaths in overweigth people, the government will now authorize payment through Medicare Part D.

Here’s what was not discussed.

• The fortunes the drug companies spent on getting doctors, health professionals, and influencers to promote the drugs and minimize their side effects.  See Reuters for US doctors and The Guardian for European influencers.
• The sharp rise in obesity prevalence between 1980 and 2000 and the environmental and commercial reasons for it.
• Anything about prevention. and changing that food environment.
• Anything serious about the down side of taking the drugs (lifetime treatment, cost, side effects, loss of joy in eating).

An editorial in The Lancet says:

A simple pill or injection will undoubtedly help some patients, but it cannot be the sole basis for addressing the complexities of obesity. Obesity is a product of not only an individual’s circumstances and behaviour, but also society at large, shaped by global food markets and trade agreements. Multidimensional approaches are needed to curb the effects of the obesogenic environment, particularly against an international industry that promotes overproduction of cheap food and drinks. Physical activity needs to increase; walking and cycling for journeys to work or school should be normalised and made easier and safer. Sugar taxes and curbs on marketing of high-energy, high-fat, ultra-processed foods need to be implemented. Prevention must be the foundation upon which everything else follows.

Other comments

• The New York Times account focuses on stigma.
• USA Today says people are suing the drug companies over side effects.

Much to be said about all this.  Stay tuned.

On Thursdays I like posting things I want everyone to enjoy.

This one, I stole from Tamar Haspel, who writes about food for the Washington Post.

I follow her on X (the site formerly known as Twitter), where she recently posted:

This could be my all-time favorite BMI correlation!

In China and post-Soviet states, BMI correlates with corruption. The fatter, the crookeder.

The correlation she cites is from an article in the Economist, Are Overweight Politicians Less Trustworthy?

I agree.  This is a fabulous example of how correlation does NOT mean causation—a basic tenet of epidemiology often forgotten.

But here’s my personal favorite example.  I laugh every time I see it.

No, the Dietary Guidelines did not cause the prevalence of obesity to rise.

This is correlation, NOT causation.

For causes, please consider food overproduction, pressures on food companies to sell food when there is so much of it, and the shareholder value movement, which demands not only profits, but  continual growth in profits.  All of these forced food companies to find new ways to get everyone to eat more food (by creating an “eat more” food environment.  I discuss all this in Food Politics and my other books).

Correlation is lots of fun but causation requires much deeper analyses.

Sorry about that.

Thanks Tamar.

Jerry Mande, a co-founder of Nourish Science wrote me to urge support for a national action plan to reduce obesity—and the chronic diseases for which it raises risks. (Note: he also has an op-ed in The Hill on NIH research and leadership needs).

Here is what we should do. It’s time for a new federal nutrition goal. For decades it’s been some variation of “access to healthier options and nutrition information.” Jim Jones [the new head of food and nutrition at FDA] used that last week in his vision for the new human foods program. It’s in USDA FNS’s mission too. The WaPo reporting on life expectancy, fatty liver disease, & Lunchables in school meals reveals that goal has failed and needs to be replaced.

The goal should be updated to: ensuring that every child reaches age 18 at a healthy weight and in good metabolic health. Cory Booker proposed making it the U.S. goal in his attached letter to Susan Rice on the WHC [White House Conference]. It’s part of the Nourish Science vision.

It’s doable.  USDA has the necessary power, reach, and resources. Over half of infants are on WIC, 1/3 of children in CACFP [Child and Adult Care Feeding Program], virtually all in school meals, and almost ½ of SNAP recipients are under 18. If we leveraged those programs to achieve the new goal and with FDA’s & CDC’s help, we could make substantial progress. For example, USDA was able to raise school meal HEI [Healthy Eating Index] scores from failing U.S. average of 58 to an acceptable 82 in just three years.

We have a successful blueprint in FDA regulation of tobacco. When we began our FDA investigation in 1993 1/3 of adults and ¼ of kids smoked cigarettes. Today we have a $700M FDA tobacco center and 11% of adults and only 2% of high school students smoke cigarettes.

We should set the new goal in the upcoming Farm Bill. We should change USDA’s name to the U.S. Department of Food and Agriculture and state the new goal.

The only needed ingredient to make this happen is an effective federal nutrition champion. That’s how tobacco happened.

I’m optimistic. We can do this.

I like the vision.  I’m glad he’s optimistic.  Plenty of work to do to get this on the agenda.

Some background

• The CDC on how nearly 70% of American adults are overweight or have obesity.
• My report on the White House Conference, a year ago
• Politico (Helena Bottemiller Evich, now at Food Fix)  on how diet- and obesity-related diseases are a huge public health problem, especially for COVID-19, but no government program exists to prevent them.
• Politico (Catherine Boudreau and Helena Bottemiller Evich) on how federal research on prevention of diet- and obesity-related diseases hardly exists.

The International Fund for Agricultural Development (IFAD), as part of its IFAD Research Series, released a report, Overweight and obesity in LMICs in rural development and food systems, along with a literature review.

The report finds obesity rates across developing countries to be approaching levels found in high-income countries.

The study attributes the rise to:

• Food Prices: The price gap between healthy foods (expensive) and unhealthy foods (inexpensive) is greater in developing countries than in rich developed countries.
• Diet: Sugar-sweetened beverage consumption is on the rise in developing countries and the global sales of highly processed foods rose from 67.7kg per capita in 2005 to 76.9kg in 2017.
• Culture: In some developing countries, childhood fatness is associated with health and wealth and consumption of unhealthy foods carries prestige.
• Gender: Women are more likely to be overweight or obese than men in nearly all developing countries.

One strength of this study is its consideration of the need for interventions across the entire food system:

The study results show that food system-related interventions are not overweight or obesity specific. Instead, they tap into the wider field of making diets more healthy and nutritious, and emerge as necessary strategies to set the scene for creating non-obesogenic food supply chains. The identified intervention strategies cut across different food system domains: there were production strategies for improved dietary diversity, strategies for processing (which involved food package labelling or price mechanisms), strategies for changing the food environment and strategies to address consumer behaviour.

I have been asked to comment on the American Medical Association’s resolution to stop using the BMI as the sole criterion for diagnosing obesity [To find this resolution, click on CCSPH Report(s) #07: Support Removal of BMI as a Standard Measure in Medicine and Recognizing Culturally-Diverse and Varied Presentations of Eating Disorders].

The BMI—Body Mass Index—defined as weight in kilograms divided by height in meters squared—is a quick way to categorize the relationship of weight to height and does a better job of identifying people with excessive body fat than most other simple and inexpensive measures.

Unfortunately, not everyone demonstrates a close correlation of BMI to body fat and those who don’t may well find themselves discriminated against in the health care system.

The BMI is also an imperfect measure of health risk:

The current BMI classification system is also misleading regarding the effects of body fat mass on mortality rates. Numerous comorbidities, lifestyle issues, gender, ethnicities, medically significant familial-determined mortality effectors, duration of time one spends in certain BMI categories, and the expected accumulation of fat with aging are likely to significantly affect interpretation of BMI data, particularly in regard to morbidity and mortality rates…[This report] outlines the harms and benefits to using BMI and points out that BMI is inaccurate in measuring body fat in multiple groups because it does not account for the heterogeneity across race/ethnic groups, sexes, and age-span.

The resolution recommends:

(1) greater emphasis in physician educational programs on the risk differences among ethnic and age within and between demographic groups at varying
levels of adiposity, BMI, body composition, and waist circumference and the importance  of monitoring these waist circumference in all individuals with BMIs below 35 kg/m2;

(2) additional research on the efficacy of screening for overweight and obesity, using different indicators, in improving various clinical outcomes across populations, including morbidity, mortality, mental health, and prevention of further weight gain; and

(3) more research on the efficacy of screening and interventions by physicians to promote healthy lifestyle behaviors, including healthy diets and regular physical activity, in all of their patients to improve health and minimize disease risks.

My translation: Keep using the BMI as an indicator, but also pay attention to body composition and waist circumference as better measures of body fat.

The AMA is not minimizing the importance of excess body fat as a disease risk factor.  It is saying that only using the BMI to evaluate the risk itself risks stigmatizing patients, especially those of non-majority race, ethnicity, and gender conformation.

This resolution ought to further sensitize physicians to such issues.  If it does, it could not come a better time.

Resources

• Stat News on the resolution
• Ancel Keys et al’s original paper on the BMI: Indices of relative weight and obesity.

I am putting the Keys’ paper into this discussion to demonstrate that Keys was quite well aware of the strengths and weaknesses of the BMI, which was intended mainly to identify groups and populations at risk of undernutrition.

Guided by the criteria of correlation with height (lowest is best) and to measures of body fatness (highest is best), the ponderal index is the poorest of the relative weight indices studied.  The ratio of weight to height squared, here termed the body mass index, is slightly better in these respects than the simple ratio of weight to height. The body mass index seems preferable over other indices of relative weight on these grounds as well as on the simplicity of the calculation and, in contrast to percentage of average weight, the applicability to all populations at all times.

The World Obesity Atlas 2023, published by World Obesity Federation, predicts that unless preventive interventions succeed, by 2035:

• The global economic impact of overweight and obesity will reach $4.32 trillion annually and constitute nearly 3% of global GDP.
• The majority—51% or more than 4 billion people—will be living with overweight or obesity.
• One in four people—nearly 2 billion—will have obesity.
• The economic impact of overweight and obesity is estimated to be over $370 billion a year in low and lower-middle income countries alone.
• Childhood obesity could more than double.

Here’s the prediction for the U.S.

In the report, the World Obesity Federation:

• Notes that member states of WHO committed to halt the increase in obesity rates at 2010 levels by 2025. No country is on track to meet these targets.
• Calls on governments to develop national action plans.
• Calls on governments to improve health care.
• Calls for building on the ROOTS framework for tackling obesity: Recognising the root causes, monitoring Obesity data, investing in Obesity prevention, ensuring access to Treatments, and adopting a Systems-based approach.

The documents:

• The press release
• The World Obesity Atlas 2023  (this includes predictions for WHO member nations) 

Comment

This is a global problem requiring global solutions., and actions by every government, including ours.   We need a national obesity prevention plan focused on strategies like to work (reduction of food insecurity, improved health care, better education, restrictions on marketing junk food, etc).

Otherwise,  we are all headed to Wall-E, which will turn out to be prescient, rather than dystopian.

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JAMA Internal Medicine has just published an editorial I wrote: Preventing Obesity—It Is Time for Multiple Policy Strategies

As it explains, it is a commentary on a research article by Joshua Petimar, et al, Assessment of Calories Purchased After Calorie Labeling of Prepared Foods in a Large Supermarket Chain  

Both papers are behind paywalls, but here are the key points of the supermarket article:

Question  Was calorie labeling of prepared foods in supermarkets associated with changes in calories purchased from prepared foods and potential packaged substitutes?

Findings  In this longitudinal study of 173 supermarkets followed from 2015 to 2017, calories purchased from prepared bakery items declined by 5.1% after labeling, and calories purchased from prepared deli items declined by 11.0% after labeling, adjusted for prelabeling trends and changes in control foods; no changes were observed among prepared entrées and sides. Calories purchased from similar packaged items did not increase after labeling.

Meaning  Calorie labeling of prepared supermarket foods was associated with overall small declines in calorie content of prepared foods without substitution to similar packaged foods.

I was really interested in this study because the “large supermarket chain” that supplied reams of data was so obviously Hannaford, which has long been ahead of the curve in trying to encourage customers to make healthier food choices.

In 2005, Hannaford initiated a Guiding Stars program that ranked–and still ranks–products by giving them zero to three stars depending on what they contain.

I wrote about the first-year evaluation of this program way back in 2006.  It did help customers to make better choices.

Now, all these years later, the FDA is contemplating doing some kind of front-of-package label.  As I said, Hannaford is way ahead.

But the point of my editorial is that single interventions rarely do better than what this study found.

I argue here for trying multiple strategies at once:

My interpretation of the current status of obesity prevention research is that any single policy intervention is unlikely to show anything but small improvements.

Pessimists will say such interventions are futile and should no longer be attempted.

Optimist that I am, I disagree.  We cannot expect single interventions to prevent population-basedweight gain ontheirown,but they might help some people—and might help even more people if combined simultaneously with other interventions.

….Widespread policy efforts to reduce intake of ultraprocessed foods through a combination of taxes, warning labels, marketing and portion-size restrictions, dietary guidelines, and media education campaigns, along with policies for subsidizing healthier foods and promoting greater physical activity, should be tried; they may produce meaningful effects.

Politically difficult? Of course. Politically impossible? I do not think so.

Unless we keep trying to intervene—and continue to examine the results of our attempts—we will be settling for the normalization of overweight and the personal and societal costs of its health consequences.

Here’s Ted Kyle’s commentary on my commentary on ConscienHealth.