Food Politics

by Marion Nestle
Aug 14 2024

AI’s dietary advice about diabetes

NutraIngredients-Europe is interested in AI.  Here’s another item:

ChatGPT’s nutrition advice is limited for NCD patients: Study: ChatGPT is “unable to replace a healthcare professional’s consultation”, new research has concluded, following an assessment of the chatbot’s ability to handle prompts for nutrition advice for patients with multiple noncommunicable diseases (NCDs).

I went right to the study:

Ponzo V, Goitre I, Favaro E, Merlo FD, Mancino MV, Riso S, Bo S. Is ChatGPT an Effective Tool for Providing Dietary Advice? Nutrients. 2024; 16(4):469. https://doi.org/10.3390/nu16040469.

The conclusion: “although ChatGPT exhibited a reasonable accuracy in providing general dietary advice for NCDs, its efficacy decreased in complex situations necessitating customized strategies; therefore, the chatbot is currently unable to replace a healthcare professional’s consultation.”

Here’s an exeerpt from an example:

Prompt: I have type 2 diabetes mellitus, obesity, and chronic kidney disease. Can you give me nutritional advice?

ChatGPT answer:
I’m not a doctor, but I can offer some general advice that you may find helpful. It’s important to consult with a healthcare professional or a registered dietitian who can provide personalized advice based on your specific health conditions and needs.

That being said, managing type 2 diabetes, obesity, and chronic kidney disease often requires a combination of healthy eating habits, regular physical activity, and sometimes medication.

[It then goes on an on about controlling portion sizes, limiting sugars, choosing lean proteins and healthy fats, etc, and ends with]

Consult a Registered Dietitian: A registered dietitian can create a personalized meal plan tailored to your specific needs, taking into account your type 2 diabetes, obesity, and chronic kidney disease.

Comment

AI is only as good as its programming.  This is boilerplate.  I don’t know about you but I don’t like talking to machines and robots (dealing with Verizon, anyone?).

Part of the demonstrable effectiveness of health care professionals is the human interaction; someone cares enough about you to offer personalized advice.

Is this kind of thing better than nothing?  I remain to be convinced.

Aug 13 2024

What I’m reading: Mexico’s nutrition law

I was interested to see this article in The Lancet: Mexico’s bold new law on adequate and sustainable nutrition.  

Mexico’s new General Law on Adequate and Sustainable Nutrition (Ley general de Alimentación Adecuada y Sostenible) is a substantial step towards transforming food systems to address NCDs and promote environmental sustainability… It enshrines the human right to food…It prioritises health, environmental stewardship, water access, children’s health, enhanced food supply and distribution, the promotion of nutritious food, reduced food loss and waste, food provision in crisis situations, and social participation in food strategies…>It includes specific goals such as the prevention of diet-related non-communicable diseases (NCDs) and the mitigation of global warming….

…The law must be protected from undue commercial determinants. Powerful individuals and organisations in the food industry can both benefit and harm human health and the environment.  Although the law promotes multistakeholder engagement, it also includes safeguards against undue influence.
This sounds great, but what does the law actually say?  Fortunately, the USDA Foreign Agricultural Service did a translated summary: Mexico Enacts the General Law on Appropriate and Sustainable Food.
Some excerpts:

Article 4 describes that the right to food includes biocultural wealth, emphasizing gastronomic diversity and agrobiodiversity, as well as the link between food and culture.

Article 5 obligates the state to fulfill the terms provided in the law with international treaties on human rights to which Mexico is a party.

Article 16 describes that students enrolled in elementary schools have the right to receive adequate food in school establishments, free of charge or at affordable prices for their families, according to their conditions of vulnerability and considering the economic situation of the geographical area in which they are located.

Article 21 involves mandatory warning label requirements for products that contain GE ingredients.

Article 22 mandates that food producers and distributors provide information requested by any individual regarding the inputs or processes used to generate their products or services.

Article 24 describes that the Secretariat of Health (SALUD) will suggest the content of food staple baskets in the states to include cultural relevance.

Article 25 describes that SALUD will determine regional food staple baskets with a priority on food that is produced locally or regionally, according to season, derived from sustainable production, and that are part of the diets in a specific region by culture and tradition.

Article 28 gives preference to state purchases of food from local or regional producers of small and medium scale, including farmers in home or backyard gardens.

Article 36…will establish a list of harmful substances based on the current regulatory and legal framework taking into consideration the principles of precaution, prevention, and sustainability. The use of substances deemed harmful to health and the environment in the production, transportation, storage, or packaging of food of any kind is prohibited.

Article 37 describes that the government, within the scope of its power, will incorporate at least 30 percent of purchases of food and primary supplies directly from small and medium-scale producers within budgetary limits.

Article 44 states that the guiding principles of the national food policies, programs, and actions which guide food production much include assurance of self-sufficiency, biodiversity, and agrobiodiversity in production.

Article 50 describes that the State and the state agencies shall jointly decide on the location of these warehouses, considering the necessary criteria for the security of the reserves and the efficient transport of food to the population affected.

Articles 56 through 63 describe the powers of SINSAMAC, an agency that will develop national food policy.

If Mexico can pass legislation like this, shouldn’t we do this too?

Aug 12 2024

Industry-funded studies of the week: Eggs

Last year, the Egg Nutrition Center offered free continuing education credits for dietitians.

This year, I received an e-mailed press release: EMBARGOED FOR RELEASE: 8:00 a.m. ET, Thursday, March 28, 2024

Fortified Eggs Did Not Raise Cholesterol in Modest-Sized Cardiology Study

Further study needed to investigate secondary findings.

…A study presented at the American College of Cardiology’s Annual Scientific Session and led by researchers at Duke, offers new evidence on fortified eggs, which are eggs enriched with various vitamins or nutrients. In a modest-sized randomized trial, researchers found that fortified eggs did not have a negative impact on bad cholesterol (LDL cholesterol) or good cholesterol (HDL cholesterol) over the course of the four-month study.

The study was sponsored by Eggland’s Best, a company that makes and sells fortified eggs. It also provided the eggs used in the research.

The egg industry funds research in collaboraion with the USDA.

Example: Mott MM, Zhou X, Bradlee ML, Singer MR, Yiannakou I, Moore LL. Egg Intake Is Associated with Lower Risks of Impaired Fasting Glucose and High Blood Pressure in Framingham Offspring Study Adults. Nutrients. 2023 Jan 18;15(3):507. doi: 10.3390/nu15030507.

Conclusion: This study found that regular egg consumption as part of a healthy diet had long-term beneficial effects on blood pressure and glucose metabolism and lowered the long-term risks of high blood pressure and diabetes.

Funding: These data were originally collected with funding from the National Heart, Lung, and Blood Institute (Framingham Study contract N01-HC-25195 and HHSN268201500001I). These analyses were also supported by a small grant from the American Egg Board’s Egg Nutrition Center of the U.S.Department of Agriculture.

Comment: Regardless of recommedations about dietary cholesterol, the advice has always been that one egg a day is OK.  That’s 365 a year.  According to the USDA’s per capata availability data, the average is only 275 (in 2021).  The egg industry wants you to eat more eggs and is working hard to get you to do that.

Aug 9 2024

Weekend Reading: Food Economics (also a gift!)

This brand new book—all 498 pages of it—is open access.

As the publisher explains,

  • This book is open access, which means that you have free and unlimited access
  • Analyzes the connections between agriculture and resource use, commodity trade, food businesses, and retail markets
  • Provides diagrams and data visualizations to explain, predict, and assess changes in the food system
  • Features rich visualizations and primary source information for updated charts from US and international sources

The authors have gone to a lot of trouble to make basic economic concepts clear.  For example,

We use the term monopoly to describe a market with just one seller and the less common term monopsony when there is just one buyer. The two are symmetrical, so both kinds of market power are sometimes called monopoly power. But distinguishing between monopoly and monopsony is useful because food businesses can potentially exercise both at the same time. For example, a large dairy processor and distributor might become a monopsonist in buying raw milk from farmers and a monopolist in selling dairy products to consumers. Their potential market power is ‘two-sided’, similar to online platforms for food delivery that could potentially become the only intermediary between restaurants and customers.

They also have lots of ifnteresting points to make.

The persistence of family farming is among the most surprising facts about the economics of food. In the U.S. and elsewhere most farms do not sell directly to consumers but operate behind the scenes, selling their produce in bulk to specialists for transport and distribution, often for use as ingredients in packaged and processed foods. Unlike farms, the food companies with whom consumers usually interact are typically owned by investors and run by hired managers. They buy ingredients from various sources, often combining produce from many different farms. Consumers everywhere in the world often seek out opportunities to buy directly from individual farmers, but that is special in part because it is relatively rare.

Take advantage of this offer!

Aug 8 2024

Vitamin supplements do not improve mortality, alas

Much fuss is being made over this study: Loftfield E, O’Connell CP, Abnet CC, Graubard BI, Liao LM, Beane Freeman LE, Hofmann JN, Freedman ND, Sinha R. Multivitamin Use and Mortality Risk in 3 Prospective US Cohorts. JAMA Netw Open. 2024 Jun 3;7(6):e2418729. doi: 10.1001/jamanetworkopen.2024.18729.

Key Points

Question  What is the association between long-term, daily multivitamin use and mortality in generally healthy adults?

Findings  In this cohort study of 390 124 generally healthy adults with more than 20 years of follow-up, daily multivitamin use was not associated with a mortality benefit.

Meaning  These findings suggest that multivitamin use to improve longevity is not supported.

Here’s the summary:

The investigators did not find any associated benefit of multivitamins for mortality.  If anything, there is a slight association with increased risk.

In this cohort study of 390 124 generally healthy US adults with more than 20 years of follow-up, daily MV use was not associated with a mortality benefit. In contrast, we found that daily MV use vs nonuse was associated with 4% higher mortality risk.

Comment

Nobody should be surprised by this result.  Lots of other studies also suggest that multivitamin supplements do not make healthy people healthier.  Healthy people are most likely to take such supplements in the belief that they might help and can’t hurt.

This study says they won’t help.  If they do hurt, it won’t be by much.

I doubt the study will make much difference to supplement takers.  Supplements are about belief, not science.

Aug 7 2024

Kamala Harris is a foodie? Who knew?

Somehow, I had missed this, but the New York Times’ Kim Severson to the rescue:  When It Comes to Food and Politics, Kamala Harris Is Riffing on the Recipe: From giving turkey-roasting advice to making dosa with Mindy Kaling, Ms. Harris has leaned into cooking in a way no other candidate has.

Ms. Harris has turned cooking videos into campaign assets and has taken a particular interest in food issues like hunger and farm labor. But she also turns to cooking as a meditation…“Everything else can be crazy, I can be on six planes in one week, and what makes me feel normal is making Sunday-night family dinner,” she told The Cut in 2018, when she was a senator. “If I’m cooking, I feel like I’m in control of my life”…In a 90-second video from 2019 that recently resurfaced on social media, she tells a reporter how to prep a Thanksgiving turkey as she’s getting a sound check before a spot on MSNBC.

She had her own cooking show!

She’s cooked with José Andres on Instagram Live.

She collects cookbooks.  KosherSoul’s Michael W. Twitty) was thrilled to find his book displayed in her kitchen.

Esquire did an analysis: An Entirely Serious Investigation into Kamala Harris’s Cookbooks,

Look, let’s levelset a little bit. That we’re even presented with a stack of cookbooks to decode from a presidential candidate feels like a win. It’s good news. Like, finally, we have a real human being—a real cooking human being—who might be the President.

The press is onto this.

The L.A. Times says:  Kamala Harris is a cook — and she knows her L.A. restaurants. Will it help her win?

Eater says Let Her Cook.

Social media users, as well as the San Francisco Chronicle, have resurfaced Cooking With Kamala, a short-lived cooking series that was published to Vice President and now-prospective Democratic presidential nominee Kamala Harris’s YouTube channel in 2019. In one episode, Harris visits Iowa, where she cooks her mother’s recipe for bacon-fried apples. In another, she bakes candy-filled “monster cookies.”

In the most popular episode, with 6 million views as of this writing, Harris makes masala dosa with the actress Mindy Kaling and the two bond over their shared South Indian heritage.

What fun!  A breath of fresh air!

Just think about what White House state dinners could be like.

Aug 6 2024

It’s National Farmers Market Week! Support your local farmers market!

USDA has proclaimed August 4 – 10 as National Farmers Market Week.  I love farmers markets and I’m glad USDA is trying to promote them.

USDA publishes a directory of US farmers markets—7,033 listings.

It also lists

  • Agrotourism sites (12,763)
  • CSAs (Community Supported Agriculture (1,011)
  • Food hubs (230)
  • On-farm markets 1,937)

Farmers markets have a long history in the U.S.  The National Agricultural Library has a report on them published in 1948.

Its got all kinds of interesting information.

Here’s the most recent information I can find on growth in numbers.

This is progress.  Farmers markets are well worth support.

The Farmers Market Coalition provides resources and toolkits.

It also makes clear why they deserve support.  Famers markets:

  • Preserve farmland
  • Stimulate local economies
  • Increase access to nutritious food
  • Support healthy communtiies
  • Promote sustainability

Besides, it’s fun to know your farmer, know your food.

Aug 5 2024

Industry-funded study of the week: widespread nutrient deficiencies Down Under

I saw this in DairyReporter, a newsletter I subscribe to.

Multi-nutrient inadequacies in ANZ linked to diet-related disease calls for food-based interventions – a2 Milk-funded study.  A study has found multi-nutrient inadequacies within the Australia and New Zealand (ANZ) populations, including nutrients associated with diet-related disease, highlighting the need for public policies and food-based recommendations to promote intake…. Read more

A2-milk again?  The last time I wrote about it, I titled my comments, A2 milk: still making claims based on industry-funded research.

Well, here’s the latest .

The study: Priority nutrients to address malnutrition and diet-related diseases in Australia and New Zealand.  Front. Nutr., 12 March 2024. Volume 11 – 2024 | https://doi.org/10.3389/fnut.2024.1370550. 

The alarming results: 22 of 31 essential nutrients are consumed by people in Australia and New Zealand below recommended levels, particularly vitamin D, calcium, omega-3 fatty acids, magnesium, folate, dietary fibre.

Funding:  “The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This project has been funded by a research grant from The a2 Milk Company. The funding body had no contribution to the methodology, data analysis, drafting of the manuscript, nor interpretation of the findings.”

Comment: The methods depend on reported intake as compared to nutritional standards.  The study does not attempt to correlate its findings with clinical signs of nutrient deficiency in the study populations studied.  I doubt there were any.  Vitamin deficiency symptoms are rarely seen in well-fed populations.  Instead, the principal diet-related diseases are those related to eating too much food—obesity and its consequences—just as they are in the U.S.

Why would the A2-Milk Company care about this topic?  My guess: so you will want to remedy this situation by drinking A2-milk.

A reminder: A2-milk, according to its producer, “comes from cows that produce only the natural A2 protein and no A1.  It is easier on digestion and may help some avoid stomach discomfort.”  Whatever.