Food Politics

by Marion Nestle
Nov 18 2025

More AI-hijacking: this time, What to Eat Now!

It’s a brave new world out there and I’m not having an easy time with it.

I’ve already told you about the DeepFake Instagram post using my image.

Now, there’s more!

Would you believe DeepFake books?

When I went on the Amazon book site on the publication date for What to Eat Now (November 11), my new book was listed first, and still is, at $25.20.

But immediately following it were these [Amazon has since taken down the listings].

Who the enterprising Mateo Velasquez and Shanz Noor might be, I have not the slightest idea.

Curious to know what this was about, my partner, Mal Nesheim, ordered copies right away and got them before the listings disappeared.

The first is a paperbound of 100 pages of blank lined paper—a blank notebook with my cover on it!

The workbook has an enticing table of contents (“Choosing real food in a complex world,” “Understanding labels and marketing tricks,” “Practicing mindful and joyful eating,” etc), but each of those headings is followed by precisely the same page and a half of “reflections” (“Awareness is the first step to reclaiming control over your nutrition and health”) and blank lines, repeated over and over.

I suppose I should feel flattered.

The moral: Caveat emptor!

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Nov 17 2025

Industry funded study of the week: Pet food

Pet food?  Yes, pet food.

I subscribe to Pet Food Industry, an exceptionally intelligent and informative newsletter.

This piece caught my eye: Study: Farmer’s Dog finds fresh dog food boosts hydration more than kibble.

One great thing about this publication is that its writers get right to the point:

Company published research showing fresh diets increase total water intake in dogs compared to dry food.

The Farmer’s Dog announced research showing that fresh diets help dogs stay more hydrated than traditional dry food. The company said the findings are among the first to directly measure total water intake in dogs across different diets.

Farmer’s Dog sells freshly made meals for dogs.

  • The study:  Rae Sires, Ryan Yamka, Joe Wakshlag. Feeding fresh food and providing water ad libitum is clinically proven to exceed calculated daily water requirements and impact urine relative supersaturation in dogsFront. Vet. Sci., 06 November 2025. Volume 12 – 2025 | https://doi.org/10.3389/fvets.2025.1675990
  • Method: “Ten dogs were used in a single cross-over study design to quantify and compare feeding a fresh food (71.1% moisture) versus a dry kibble food (6.1% moisture) on total daily water consumption (drinking + food moisture).”
  • Results: “…dogs consuming the fresh food consumed significantly more total water daily on average per day.”
  • Conclusion: “…fresh food can impact urine relative supersaturation and help support hydration in healthy adult dogs or those that are at risk of dehydration and water loss.”
  • Funding: “The author(s) declare that financial support was received for the research and/or publication of this article. This series of studies was fully funded by The Farmer’s Dog. The funder was not involved in the study design, collection, analysis, interpretation of data, the writing of this article, or the decision to submit it for publication.”
  • Conflict of interest: RS and RY were employed by The Farmer’s Dog. RS and RY are employed within the Research Department of The Farmer’s Dog and conduct nutrition research for potential use in future commercial fresh dog food applications and products.

Comment

Disclosure: I met the founders of Farmer’s Dog years ago when they first started the company, and have followed its progress with great interest. Their company has done well.  Its freshly made meals are not cheap.  To find out what they cost, you have to fill out a lengthy form about your dog.  For the chapter on pet food in What to Eat Now, I invented and filled out the form for a 20-pound, moderately active dog.  Its meals cost $5 a day in 2024 ($1800 a year).

As for this study: it is a standard example of industry-funding, conducted by employees of the funder, with a predictable outcome favoring the sponsor’s product.  A second study compared Farmer’s Dog food to canned food; in this one dogs eating the canned food took in more water.  But the overall conclusion makes perfect sense; if you feed dogs more water, they take in more water.

Nov 14 2025

Weekend response: media about What to Eat Now

Several readers have written to ask for links to media appearances related to What to Eat Now.  

I’ve been trying to keep a list.  Here’s what I have so far.  Enjoy and thanks for asking!

From earlier this year

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Nov 13 2025

The 2025-2030 Dietary Guidelines: Some preliminary speculation

As I noted last May, I get asked all the time about what they will say, but have no inside information.  But this may be a good time to go over the clues.

The process

  • A scientific advisory committee reviews the research and writes a report.  This was released in December.
  • Unspecified (to date) people in USDA and HHS write the guidelines.

The promises

What they won’t say

  • They will not continue the tradition of “leftist ideology”  [I think this must mean plant foods]
  • They will not promote seed oils (RFK Jr prefers beef tallow).
  • They will not promote sugar; RFK Jr says sugar is poison.  [But declared a MAHA Win for Coca’ Cola’s replacement of high fructose corn syrup with cane sugar]
  • They won’t say anything about sustainability [anything about climate change is forbidden]

What they will be about

[According to Reuters] Kennedy said the new guidelines would change the kind of food served to military service members and children in schools, but gave no details on the new recommendations.

“If we want to solve the chronic disease crisis, we have to tackle obesity,” Kennedy said. “Obesity is the number one driver of chronic disease,” he said, adding that 50% of the adult U.S. population was obese or overweight, driving costs up for diabetes care and cardiac diseases.

What they might say

Beef

  • In its Plan to Fortify the Beef Industry, the USDA says the 2025–2030 Dietary Guidelines will “encourage protein as the foundation for every meal.”
  • In an announcement to ranchers, USDA quotes RFK Jr, “we are restoring whole foods as the foundation of the American diet and ending the decades-old stigma against natural saturated fat in beef and dairy products. We will strengthen America’s ranching industry so families can choose nutrient-dense, minimally processed foods.”

Dairy

In a news conference, officials gave some clues.

We are going to be there for the dairy industry…our agencies are about to release more dietary guidelines in the next several months that will elevate those products to where they ought to be…There’s a tremendous amount of emerging science that talks about the need for more protein in our diet, and more fats in our diet, and there’s no industry that does that better than this industry.

Speculation

When RFK Jr first talked about the new guidelines, he said they would ignore the scientific advisory committee report and would be simple, short (5 pages), easy to understand, and out by September.  I’m guessing that the conflict between the science and ideology is proving more difficult to resolve than anticipated.

The science continues to argue for a largely (but not necessarily exclusively) plant-based diet, reduced in meat and ultra-processed foods from current levels.  RFK Jr initially talked about the need to reduce intake of ultra-processed foods, but the second MAHA report merely asked for a definition.

This administration seems obsessed with protein, a nutrient already in excess in US diets.

If it wants to do something about obesity, it needs the guidelines to suggest ways to reduce calories.  Nobody has mentioned that word so far.

As I keep saying, I can’t wait to see what the new guidelines will look like.  Stay tuned.

 

Nov 12 2025

Not something I wanted to see: Botulism in infant formula

I first learned about this from food safety lawyer Bill Marler: Botulism Alert: ByHeart—brand powdered infant formula linked to 13 illnesses in 10 states.

All 13 cases included in this outbreak are reported to have consumed ByHeart-brand powdered infant formula. Officials in several states have collected leftover infant formula for testing. This testing is underway, and results are not yet available. [Note: Cases are now up to 15].

The FDA announced the out-of-caution recall.

Infant botulism is a rare but potentially fatal illness that presents a serious threat to the health of infants which occurs when Clostridium botulinum spores are ingested and colonize the intestinal tract, producing botulinum neurotoxins in the immature gut of infants. Affected infants can present with some or all of the following signs and symptoms: constipation, poor feeding, ptosis (drooping eyelid), sluggish pupils, low muscle tone, difficulty sucking and swallowing, weak or altered cry, generalized weakness, respiratory difficulty, and possibly respiratory arrest.

  • The FDA has an ongoing investigation of infant botulism among babies in the U.S.
  • The FDA has not identified a direct link between any infant formula and these cases and there is no historical precedent of infant formula causing infant botulism.
  • ByHeart is taking the proactive step to remove any potential risk from the market and ensure the highest level of safety for infants.

But then: Breaking News: Tested sample of ByHeart powdered infant formula linked to illnesses – preliminary tests are positive for Botulism 

CDPH [California Department of Public Health] has tested a can of powdered infant formula that was fed to an infant with infant botulism. Preliminary results suggest the presence of the bacteria that produce botulinum toxin, consistent with the same toxin reported in the confirmed infant cases.

On its website, ByHeart has “an update for our ByHeart Family.”

Today, we were made aware by the California Department of Public Health (CDPH) that a single, previously-opened sample from one of the two recalled batches of ByHeart formula tested positive for Clostridium botulinum, the bacteria that causes infant botulism. We are treating the CDPH’s test result very seriously.

However, testing from a previously-opened can lacks scientific basis to establish causation between the product and illness. We know that Clostridium botulinum is a bacteria that exists naturally in the environment—in places like soil, dust, and even vegetables—meaning that an opened can can be contaminated in multiple ways.

Currently global regulatory and scientific authorities do not recommend testing powder infant formula for Clostridium botulinum, and no U.S. or global infant formula company tests for Clostridium botulinum.

It has recruited a laboratory to do its own testing.

But testing of infant formula for botulism spores is difficult, perhaps impossible.

Infants get botulism from spores, whereas adults get it from the toxin produced by bacteria that develop from the spores.  The clinical tests in infants measure the neurotoxin produced by bacteria in their stools.

Understand: powdered infant formula is not sterile.  Botulism is extremely rare in powdered infant formula.  It is more common in honey, which is why you are not supposed to give honey to infants.

I looked up ByHeart Formula.  It claims to be a healthier alternative to commercial infant formulas:

  • Closest-to-breast-milk patented protein blend (alpha-lac, lactoferrin, partially hydrolyzed proteins)
  • Made with organic whole milk (not skim)
  • Clinically proven benefits (easy digestion, less spitup, softer poops, more efficient weight gain, supports brain & eye development, immune health and gut health).

Clinically proven?  By Heart has a clinical trial to prove it, in which infants were fed By Heart or a commercial formula.

Conclusions: “The SF [study formula] resulted in improved parent-reported gastrointestinal tolerance and more efficient growth with less daily formula and protein intake supporting that this novel formula may potentially reduce the metabolic burden of protein overfeeding associated with infant formula.”

Sources of Funding: “This trial was funded by ByHeart, Inc. No funding was received from National Institutes of Health (NIH), Wellcome Trust, Howard Hughes Medical Institute, or other sources.”

Conflicts of interest: At least five of the authors report honoria for serving on the By Heart Scientfic Advisory Board.

OK, so this is a standard industry-funded study with results interpreted as favoring the sponsor’s interests.

But take a look at the accompanying editorial.  Its authors note that the effects of the By Heart formula are “almost identical” to those of the comparison commercial formula.

“There were no consistent differences in any of the growth parameters measured….no data are presented supporting that this formula achieves outcomes closer to the breastfed reference than did the control formula.”

By law, the contents of infant formula are tightly regulated; formula-fed infants are entirely dependent on formula for their survival.

That’s why this situation is such a tragedy.

Let’s hope ByHeart can figure out a way to make sure this never happens again.

Resources: Bill Marler’s additional links

Nov 11 2025

What to Eat Now. Today is publication day!

Today marks the official publication of my new book, What to Eat Now!  All 703 pages of it!

Here’s the press release.

Order it—ISBN 9780374608699—from Amazon   Barnes & Noble   Books-a-Million   Bookshop   Powells   Target

What to Eat Now: The Indispensable Guide to Good Food, How to Find It, and Why It Matters.

It’s a thoroughly revised version of What to Eat, published in 2006.

A lot has changed, much more than I imagined when I set out to do this.  I thought it would be a six-month project, but it’s now four years later.

The big changes?  Ultra-processed, plant-based, and cannabis, for starters.  But there’s much, much more.

This is a book about how to think about food issues.  Come with me on a trek through supermarkets to see what today’s food marketing looks like, and its effects on our health and that of the environment.

I’m collecting information and reviews on this page.

Come to the event at NYU:

The Culinary Historians of New York and the NYU Department of Nutrition and Food Studies invite you to the semi-official launch of the book: The Politics of Your Plate: A Conversation with Dr. Marion Nestle, 6 p.m. to 8 p.m., NYU Bobst Library, 70 Washington Square South, Richard A. Chase North Reading Room, 2nd Floor.  Register here.

Enjoy!!!

Nov 10 2025

Industry funded studies of the week: Mango

In case it’s not obvious, I view studies claiming major health benefits from eating one food—mangoes in this case—to be about marketing, not science.  We don’t eat just one food; we eat diets of enormous complexity.  This makes such studies inherently ridiculous.  And I’m not the only one who thinks so.  Some examples:

IInsulin sensitivity

This one comes from Obesity and Energetics Offerings’ occasional series on “Headline vs Study”

Headline: Daily Mango Consumption May Improve Insulin Sensitivity in Overweight or Obese Adults.

Study: RCT [randomized control trial] of Mango or Control Product: Markers of Inflammation [Joint Primary Outcomes] Were Not Different at the End of 4 Weeks. [Oops]

Here’s the press release from the National Mango Board: New Study: Eating Mangos Daily Shown to Improve Insulin Sensitivity and Blood Glucose Control.  It notes: “This study was supported through an unrestricted grant from the National Mango Board (NMB). NMB had no influence over the study or its findings.”

II.  Cholesterol and blood pressure

Here’s the blurb for this one: Journal of the American Nutrition Association Mango intake linked to short-term cholesterol, blood pressure benefits A two-week trial in postmenopausal women found that daily mango consumption lowered blood pressure and fasting cholesterol, though it did not affect microvascular function or inflammation markers. Read More

Conclusions: Further research using amounts of mango typically consumed, over an extended period of time, are warranted [well, at least this is an honest assessment].

Funding: This study was supported by a research grant from the National Mango Board. The sponsor had no role in the design or conduct of the study, the data analysis, interpretation of the results, or the decision to publish.

III.  Diabetes prevention

Basiri R, Dawkins K, Singar S, Ormsbee LT, Akhavan NS, Hickner RC, Arjmandi BH. Daily Mango Intake Improves Glycemic and Body Composition Outcomes in Adults with Prediabetes: A Randomized Controlled Study. Foods. 2025; 14(17):2971. https://doi.org/10.3390/foods14172971 

Conclusion: The daily consumption of mango for 24 weeks improved the glycemic control, insulin sensitivity, and body composition in adults with prediabetes, which supports the potential of mango as a practical dietary intervention for metabolic health.

Funding: The National Mango Board provided funding for this study.

From ConscienHealth: Magical Mango Thinking About Preventing Diabetes

Diabetes Prevention?

But the real problem with claiming a benefit for diabetes prevention is that this study did not study the onset of diabetes.

So do mangoes prevent diabetes? Not likely. Not all by themselves.

Are they a better snack than sugary granola bars? Probably so.

From Medical News Today: Is it OK to eat mango if you’re at risk for diabetes? Experts weigh in

  • In a recent study, mangoes more effectively improved prediabetes risk factors in a new study than low-sugar granola bars.
  • The key to mangoes’ better results likely lies in their being a whole food with natural fiber, vitamins, and nutrients.
  • However, experts agree that the best way to avoid type 2 diabetes is to eat a balanced, healthy diet and be physically active, rather than to depend on a single ‘superfood’ to prevent the condition.

Comment

Enough said.  I love mangoes (although I have to be careful about their skin and pits).  Their deliciousness is reason enough to eat them.  I suppose the Mango Board has to justify its existence….

Nov 7 2025

Weekend pre-ordering: What to Eat Now

I just got my first copy!  My new book, What to Eat Now!  All 703 pages of it!

The official publication date is November 11, but it can be pre-ordered.  ISBN 9780374608699. Amazon   Barnes & Noble   Books-a-Million   Bookshop   Powells   Target   It comes hardbound and in Kindle and Audible editions.

Enjoy!

Early press coverage

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