by Marion Nestle

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Mar 21 2024

The ultimate fusion diet: Chinese-Mediterranean?

I learned about this from reading a headline in FoodNavigator-Asia: Mediterranean diet linked to reduced neurodegeneration in elderly Chinese.

This got my attention: Why would anyone be studying the Mediterranean diet in Chinese people.  The traditional Chinese diet, like that of the Mediterranean diet, is largely plant-based and strongly associated with health and longevity.

But here we have it.  Basically, they want to know if this diet works in Chinese as well as North American and Oceanic populations.  As so it does.

The study: Association of adherence to the Chinese version of the MIND diet with reduced cognitive decline in older Chinese individuals: Analysis of the Chinese Longitudinal Healthy Longevity Survey.  The Journal of nutrition, health and aging.  Available online 1 January 2024, 100024

  • Purpose: This study aimed to assess the correlation between the Chinese version of the MIND (cMIND) diet and cognitive impairment in older Chinese individuals.  [MIND = Mediterranean-Dietary Approaches to Stop Hypertension (DASH) diet intervention for Neurodegenerative Delay].
  • Method: The cMIND diet score (cMINDDS) was calculated by assessing dietary patterns based on survey responses.
  • Results: The increased cMINDDS was associated with a reduced risk of cognitive impairment. Higher consumption of fresh fruits and nuts was associated with a decreased risk of cognitive impairment (OR = 0.77, 95% CI: [0.66, 0.89] and OR = 0.70, 95% CI [0.58, 0.86], respectively).
  • Conclusion: Adherence to the cMIND diet was associated with lower risks of cognitive impairment in older Chinese individuals.

About the diets

The MIND diet recommended 10 brain-healthy food groups (green leafy vegetables, other vegetables, nuts, berries, soybeans, whole grains, not fried fish, not fried poultry, olive oil, and wine) while avoiding five unhealthy groups (red meat and products, butter/margarine, cheese, pastries and sweets, and fast fried foods).

The cMIND diet comprises 12 components: staple food composition, quantity, fresh vegetables, mushrooms or algae, fresh fruits, fish, cooking oil, soybeans, nuts, garlic, tea, and sugar.

Here’s a quick comparison:

Comment:  Both diets are healthy.

Bottom line (can’t be emphasized enough, apparently): Eating a healthy diet is good for health.

Mar 18 2024

Industry-funded study of the week: Would you believe kimchi?

I learned about this one from a commentary from Yoni Freedhoff, MD: Kimchi: Not Magically Protective Against Weight Gain.

  • The study: Association between kimchi consumption and obesity based on BMI and abdominal obesity in Korean adults: a cross-sectional analysis of the Health Examinees study.  BMJ Open.  2024 Jan 30;14(2):e076650.  doi: 10.1136/bmjopen-2023-076650.
  • Participants: “This study analysed 115 726 participants aged 40-69 years enrolled in the Health Examinees study in Korea.”
  • Results: “In men, total kimchi consumption of 1-3 servings/day was related to a lower prevalence of obesity (OR: 0.875 in 1-2 servings/day and OR: 0.893 in 2-3 servings/day) compared with total kimchi consumption of <1 serving/day. Also, men with the highest baechu kimchi (cabbage kimchi) consumption had 10% lower odds of obesity and abdominal obesity. Participants who consumed kkakdugi (radish kimchi) ≥median were inversely associated with 8% in men and 11% in women with lower odds of abdominal obesity compared with non-consumers, respectively.”
  • Conclusions:  “This large cross-sectional study described the association between kimchi consumption and obesity. In conclusion, total kimchi consumption of 1–3 servings/day was shown to be reversely associated with obesity in men. Regarding the type of kimchi, baechu kimchi was associated with a lower prevalence of obesity in men, and kkakdugi was associated with a lower prevalence of abdominal obesity in both men and women. However, since all results showed a ‘J-shaped’ association, excessive consumption suggests the potential for an increase in obesity prevalence. As kimchi is one of the major sources of sodium intake, a moderate amount of kimchi should be recommended for the health benefits of its other components. In addition, further investigation and prospective studies are needed to confirm the relationship between kimchi consumption and obesity.”
  • Competing interests: “HJ and SS have no conflicts of interest to declare for this study. Y-RY and SWH are members of the staff at the World Institute of Kimchi.”
  • Funding: “This research was supported by grants from the World Institute of Kimchi (KE2201-1) funded by the Ministry of Science and ICT, Republic of Korea.”

Dr. Freedhoff ‘s analysis of the data:

According to the paper, men who reported eating two to three servings of kimchi per day were found to have lower rates of obesity, whereas men who reported eating three to five servings of kimchi per day were not. But these are overlapping groups! Also found was that men consuming more than five servings of kimchi per day have higher rates of obesity. When taken together, these findings do not demonstrate a statistically significant trend of kimchi intake on obesity in men. Whereas in women, things are worse in that the more kimchi reportedly consumed, the more obesity, in a trend that did (just) reach statistical significance.

Comment: Why anyone would expect kimchi (spicy fermented vegetables such as cabbage) to affect obesity one way or the other is beyond me, but the World Institute of Kimchi must want more people to eat it.  Does anyone need an excuse to eat kimchi?  It’s great on its own without needing this kind of claim.  This study is about marketing, not science.

Mar 14 2024

Foods of the future: Yum?

I’m constantly being asked what food will look like in the future, so I’ve been collecting items about new-and-unusual foods headed our way.

Do these bode well for the future of food?  You decide.

New Foods

Cultivated meat

Comment: It’s a brave new world out there.  Two issues:  (1) Is this stuff delicious?  (2) Will it make money?  Stay tuned.

Mar 13 2024

An update on Nutri-Score: despite food industry opposition, it’s doing well

A recent opinion piece in the Washington Post explains why the FDA should establish front-of-package nutrition labeling here and now: These countries are doing nutrition labels the right way

Christina Roberto, Alyssa Moran, and Kelly Brownell contrast the “stop signs you’ll see in Mexico, the Nutri-Score system used in France, or the Health Star Ratings in New Zealand” with the current lack of a system like those in the United States.

The only thing standing in the way: the food industry. It favors a label that displays grams or milligrams of key nutrients along with percent Daily Values — much like the Nutrition Facts Labelcurrently on the back or side of packages. ..By using symbols, colors and simple language, front-of-package labels adopted by other countries have educated people about what’s in their food, helped them make healthier choices and even encouraged companies to reduce salt and sugar in their products.

And here’s Fortune on the same topic, especially Nutri-Score.

This makes me think it’s time to review what’s happening in Europe with Nutri-Score.  I’ve written about this system previously, most recently here and about Its founder, Serge Hercberg’s, fights with the food industry here.

As a reminder, Nutri-Score accounts for nutrients but also sugar, salt, and saturated fat, in a composite grade A (eat) to E (avoid).

The food industry hates it.  For example, an article by authors with ties to industry argues that there is no independent evidence to support the value of Nutri-Score.  This induced Hercberg et al to rebut those points.

In response to some of these criticisms, the Nutri-Score team is updating its algorithm to respond to concerns about ultra-processing, among other matters.  See: Nutri-Score 2023 Update in Nature Food.

And despite the arguments, support for Nutri-Score is growing.  Authors not connected to Nutri-Score recommend it over other types of labeling for adoption by 27 EU nations.  See: Establishing an EU-wide front-of-pack nutrition label: Review of options and model-based evaluation.  Obesity Reviews, 07 February 2024. https://doi.org/10.1111/obr.13719

Nutri-Score is currently used in seven European countries.  It is backed by the European Public Health Association and the International Agency for Research on Cancer.

The food industry can complain all it wants, I’m guessing Nutri-Score is here to stay.  It may not capture all ultra-processed foods, but it comes close and revising the design like this should help solve that problem.

Mar 11 2024

How the food industry exerts influence VI: South African researchers (Nestlé)

Since it’s Monday when I post industry-funded studies anyway, I will add one more of these to last week’s collection.

This one comes from an articles in The Conversation: Big companies, like Nestlé, are funding health research in South Africa – why this is wrong.

At the time a group of more than 200 senior academics wrote an open letter, about conflicts of interest. Nestlé’s portfolio of foods, by its own admission, includes more than 60% that don’t meet the definition of healthy products.

In December last year, the same centre announced it had signed a memorandum of understanding with Nestlé. It signalled their intent to “forge a transformative partnership” to shape “the future of food and nutrition research and education” and transform “Africa’s food systems”.

The article mentions other such partnerships.

The article covers reasons why researchers need to avoid such partnerships, some of them based on my work on this site.

It ends by suggesting how to counter industry influence:

An online course and toolkit for research ethics committees on conflict of interest in health research provides some practical guidance.

These and other initiatives point the way forward for universities to be alert to the dangers of these “gift relationships” and to be better equipped to protect their integrity.

Mar 7 2024

How the food Industry exerts influence IV: Science teachers and public health professionals (beef industry)

Two examples of  beef-industry attempted influence:

I.  Science teachers

This one comes from Wired: Inside the Beef Industry’s Campaign to Influence Kids

Big Beef is wooing science teachers with webinars and lesson plans in an attempt to change kids’ perceptions of the industry.

A beef industry group is running a campaign to influence science teachers and other educators in the US. Over the past eight years, the American Farm Bureau Foundation for Agriculture (AFBFA) has produced industry-backed lesson plans, learning resources, in-person events, and webinars as part of a program to boost the cattle industry’s reputation.

What is the AFBFA?

The AFBFA is a contractor to Beef Checkoff, a US-wide program in which beef producers and importers pay a per-animal fee that funds programs to boost beef demand in the US and abroad. In 2024, Beef Checkoff has approximately $42 million to disperse across its initiatives, and a funding request reveals that the AFBFA’s campaign for 2024 is projected to cost $800,000. The allocation of Beef Checkoff funding to programs like this is approved by members of the Cattlemen’s Beef Board and the Federation of State Beef Councils, two groups that represent the cattle industry in the US.

What does this program teach?

One lesson plan provided as part of the program directs students to beef industry resources to help devise a school menu. In another lesson plan students are directed to create a presentation for a conservation agency regarding the introduction of cattle into their ecological preserve. A worksheet aimed at younger students has them practice their sums by adding up the acreage of cow pastures. Another worksheet based around a bingo game aimed at 8- to 11-year-olds asks teachers to “remind students that lean beef is a nutritions source of protein that can be incorporated in daily meals.”

As for the answer to my question yesterday about whether this kind of training works:

According to survey data included in these documents, educators who attended at least one of the AFBFA’s programs were 8 percent more likely to trust positive statements about the beef industry. Some 82 percent of educators who participated in a program had a positive perception of how cattle are raised, and 85 percent believed that the beef industry is “very important” to society.

Again, this is a USDA-sponsored checkoff program.  The US Dietary Guidelines on beef call for it to be lean and unprocessed.  The checkoff does not.

II.  Public health professionals

I received this e-mailed message from a reader who wishes to remain anonymous.

I am a member of the Kentucky Public Health Association and so receive their email newsletters. The Beef Council promotion is fairly new. It is interesting to watch an industry PR campaign with health professionals happen in real time. I’ve also just realized that I don’t believe the Association has policies around sponsorships, something I had not worried about until the past few months.

She forwarded two messages sent to her from the Kentucky Public Health Association.  These are announcements from the Kentucky Beef Council: “Happy Nationl Nutrition Month,” and “Fueling Tween and Teens with Strong Minds and Bodies.”

The second is labeled as an advertisement; the first is not.

Both encourage visits to the Beef Nutrition Education Hub to get free continuing education credits and other resources.

Both say:

Thank you to our 38,000 Kentucky Beef Farmers! Fun Fact: Kentucky is the largest beef-producing state East of the Mississippi River

This email was sent on behalf of KY Beef Council and the content within shall be attributed to the sponsor. This email shall not indicate an endorsement on behalf of KPHA.

Copyright © 2023  Kentucky Public Health Association

Comment:  The Kentucky Beef Checkoff at work!   Regardless of the Kentucky Public Health Association’s protestations, these messages give the appearance of endorsement.  It should not be doing this.

Mar 4 2024

How the food industry exerts influence I: food and nutrition professionals (potato industry)

Lately, I have been asked repeatedly to explain just how the food industry exerts influence to protect and promote product sales.  This week’s posts address that question, starting with the usual Monday industry-funded study of the week, in this case an opinion piece sponsored by the potato industry.

Potato trade associations work hard to overcome concerns about this food’s rapidly absorbable starch content.

I received an email from the Alliance for Potato Research & Education telling me that if I don’t eat potatoes, I might become nutritionally deficient.

New publication alert: swapping out starchy vegetables may lead to unintended nutrition consequences.

A new perspective paper published in Frontiers in Nutrition underscores starchy vegetables are more than just carbs – they’re a vital vehicle for essential nutrients. Yet, as confusion around “good versus bad carbs” persists among consumers, there is a risk of starchy vegetable avoidance in favor of other carbohydrate foods perceived as equally or more nutritious – or even carbohydrate avoidance all together.

The press release cited a paper with this conclusion:

Replacing starchy vegetables with grain-based alternatives, including whole-grain foods, for one day led to a 21% decrease in potassium, a 17% decrease in vitamin B6, an 11% drop in vitamin C and a 10% reduction in fiber.

This called for a look at the actual paper.

The paper: Carbohydrate confusion and dietary patterns: unintended public health consequences of “food swapping.”   Ayoob, K.  Front. Nutr., 28 September 2023. Volume 10 – 2023 |

Rationale: “Nutrient-dense dietary patterns include both grain foods and starchy vegetables. These food groups are currently considered separately [by the Dietary Guidelines for Americana], and they must remain separate to ensure people are encouraged to consume complementary nutrients from each of these food groups.”

Conclusion: “Using complex carbohydrate foods, specifically starchy vegetables (e.g., potatoes) and grains, interchangeably is at best, not a useful strategy, but at worst, may increase the risk of micronutrient inadequacy and/or dietary imbalances.”

Funding: “The author(s) declare financial support was received for the research, authorship, and/or publication of this article. Funding for this perspective was provided by Potatoes USA.”

Conflict of interest: “This study received funding from Potatoes USA. The funder had the following involvement with the study: composition and data analysis of the menu modeling. KA was compensated by Potatoes USA for preparation and revision of the manuscript.  The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision.”

Comment: I like potatoes, think they have nutritional value (especially when baked rather than fried), and do not view them as poison.  But: this paper is an opinion piece commissioned, developed, and paid for by a potato trade association.  And sent to me in a press release.

Mar 1 2024

Weekend reading: the ironies of drinking fluid milk

Anne Mendelson.  Spoiled: The Myth of Milk as Superfood.  Columbia University Press, 2023 (396 pages).

 

I am an admirer of Anne Mendelson’s books and did a blurb for her Chow Chop SueyBut this one is over the top—original, compelling, brilliantly written.

Driving this book is a question I’ve not heard asked before, at least not so directly: Why and how did the consumption of fresh liquid milk (“drinking-milk”)—as opposed to fermented dairy products—become framed as a nutritional necessity?

Her question derives from some basic facts about cow’s milk and its industrial production:

  • Once cow’s milk leaves the udder, it is easily contaminated with pathogenic bacteria.
  • Most adults have stopped making the enzyme that digests the sugar lactose in milk and can’t drink it without getting unpleasant digestive systems.
  • To produce milk safely requires complicated and expensive industrial processes.
  • The cost of milk production exceeds the price people are willing to pay for it; dairy farming is a losing proposition even with taxpayer subsidies.
  • Industrial milk production is hard on cows and pollutes the environment.

Why are we even doing this?  For this, she blames 19th and 20th century European and American doctors who thought the ability to digest lactose normal, nutritionists (calcium!), and the USDA (3 servings a day!).

She is not against eating dairy foods when they are fermented.  These, yogurt and the like, are much safer.  Friendly bacteria split the lactose along with producing acid that destroys pathogens.

You don’t have to agree with all her points to appreciate how well they are argued.

To wit:

[The book] argues that influential nutritional theories about fresh and fermented milk took a disastrously wrong turn in the eighteenth century.  The reason is that the founders of modern Western medicine had no way of understanding the genetic fluke that allowed them, unlike most of the world’s peoples, to digest lactose from babyhood to old age.  In other words, today’s mega-industry stemmed from a lack of scientific perspective.  That lack turned the one form of milk that is most fragile, perishable, difficult to produce on a commercial scale, and economically pitfall-strewn into a supposed daily necessity for children and, to a lesser extent, adults.  [pp x, xi].

No other food product is as staggeringly difficult and expensive to get from source (in this case, a cow) to destination (milk glass on table) in something loosely approximating its first condition.  If one existed, it would be treated as an astounding luxury. [p. 1].

Mendelson takes deep dives into the history of dairy use, dietary recommendations, industrial production, and government dairy policy.  In attempting to teach about the Farm Bill, I was defeated by Milk Marketing Orders, the formulas used by the government to set price support levels required to be paid by “handlers” (milk processors) to dairy producers in different areas of the country.  I could not find anything about this in the index, alas, but I loved what she says about them on page 205.

These formulas gradually became as abstruse, and as unintelligible to anyone outside a small charmed circle, as anything in the bad old days before the federal government stepped in.  Far from abolishing the buyer’s market, they trapped farmers selling fluid milk within the marketing order system in endless struggles to wring enough out of handlers to recoup production costs….What I do understand is that as the postwar era advanced, the sheer incomprehensibility of producer-handler milk price schemes again became an endless frustration to dairy farmers, above all those trying to make a living within the marketing order system for drinking-milk.

One final irony:

Nothing is going to dislodge supermarket drinking-milk from its towering economic importance.  It is certain to continue along the track of expansion, consolidation, and increasingly complex technological infrastructure that it has pursued for almost three quarters of a century.  Big Milk is going to become Bigger Milk.  Its absurdities are also sure to become more entrenched.  The greatest of these is the plain fact that Americans are drinking less milk while dairy farms are producing more of it.

A personal comment: The book triggered a memory.  I once visited a school lunch program in Barrow (now Utqiaġvik), Alaska.  Inuit children were served the standard USDA lunch, which requires half-pint cartons of milk.  I did not see any of them drinking it.  The untouched cartons were discarded.  The milk was not only culturally inappropriate, but wasteful.  All food in that part of North Alaska has to be flown in on airplanes.

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