Search results: superfood

It’s been more than a year since I last wrote about avocado industry funding of research but the Avocado Nutrition Center has been sending out press releases so it’s time for another look.

Given the Superbowl—105 million pounds of avocados consumed that day by one estimate—you might not think that the avocado industry would have to work as hard as it does to convince you that avocados are a superfood.

But maybe what it is trying to do is to get us to ignore the effects of our demand for avocados on deforestation and social unrest in Mexico.

The avocado industry is a good example of how to fund research for marketing purposes.  It funds the Avocado Nutrition Center’s research program.

The program’s website covers dozens of industry-funded studies that demonstrate benefits of avocados for cardiovascular health, weight management, type 2 diabetes, and healthy living at every age.

Here’s how the Center uses them.

Another recent study of 2,886 older adults, published in Frontiers in Nutrition, examined cognitive function among older American avocado consumers compared to nonconsumers.

On that basis, the Center produced a fact sheet: Proactive thinking on cognition.  

The Center also lists a few independently funded studies that produced equally beneficial results.

I picked one at random and looked it up: Avocado Consumption and Risk of Cardiovascular Disease in US Adults.

• Conclusion: Higher avocado intake was associated with lower risk of CVD and coronary heart disease in 2 large prospective cohorts of US men and women. The replacement of certain fat-containing foods with avocado could lead to lower risk of CVD.
• Funding: mostly by NIH
• Conflicts of interest: the lead author reports having “collaborated in the Hass Avocado Board–funded trial Effects of Avocado Intake on the Nutritional Status of Families during 2016 to 2019 as a graduate student researcher, but the present study was not supported or endorsed by the Hass Avocado Board. The remaining authors have no disclosures to report.”

And here’s the most recent study: Effect of Incorporating 1 Avocado Per Day Versus Habitual Diet on Visceral Adiposity: A Randomized Trial

• Conclusion: Addition of 1 avocado per day to the habitual diet for 6 months in free‐living individuals with elevated waist circumference did not reduce visceral adipose tissue volume and had minimal effect on risk factors associated with cardiometabolic disorders.
• Funding: This work was supported by the Avocado Nutrition Center.

Why be concerned?  Aren’t avocados good for you?

Sure, and I love them.  But superfoods?  All fruits and vegetables have useful nutrients, but some have fewer calories (a serving size is one-third of an avocado) and most are less caught up in ecological damage.

I discuss the scientific reasons for concern in my book, Unsavory Truth: How Food Companies Skew the Science of What We Eat.  In it, I review the literature on the “funding effect”—the observation that research sponsored by food companies almost invariably produces results favorable to the sponsor’s interests.  Research on conflicts of interest also demonstrates that recipients of industry funding do not recognize its influence, did not intend to be influenced, and deny the influence, despite vast amounts of research to the contrary.

Daily Harvest is a company that makes vegan meals, mostly organic, and freezes them for home delivery.

By mid-June, it had received 470 complaints from customers who ate a new product, French Lentil + Leek Crumbles, but developed severe liver and gall bladder problems.  On June 23,  Daily Harvest issued a recall of the product “due to potential health risk” (also see After 470 reports of illnesses, Daily Harvest recalls French Lentil + Leek Crumbles).

I was especially interested in this event for two reasons: Daily Harvest twice sent me meals to sample (before it introduced this one) and I knew they had to be cooked before eating, which would kill harmful microbes, and I could not imagine what could possibly cause reactions this toxic (as I explained to the New York Times).

This product’s ingredient list seems benign:

organic butternut squash, organic hemp seeds, organic cauliflower rice, organic extra virgin olive oil, organic french lentils, organic red lentils, organic tri-colored quinoa, organic cremini mushrooms, organic tara flour, organic leeks, organic parsley, water, organic cassava root flour, organic flax seeds, organic sacha inchi powder, chia seeds, organic porcini powder, himalayan sea salt, organic apple cider vinegar, organic onion powder, nutritional yeast, organic garlic powder, organic tomato powder, organic white pepper, organic coriander seeds, organic mustard powder, organic thyme.

More than that, on June 25, food safety lawyer Bill Marler was asking the same question: What is it in Daily Harvest’s French Lentil and Leek Crumbles that is causing liver failure?  He was sending samples out to his own labs.

On June 28, Daily Harvest responds to customers sickened, hospitalized from 1 of its products.

On June 30, the FDA published its Investigation of Adverse Event Reports: French Lentil & Leek Crumbles

On June 17, 2022, in response to consumer complaints submitted to the company, Daily Harvest voluntarily initiated a recall of their French Lentil & Leek Crumbles…From April 28 to June 17, 2022, approximately 28,000 units of the recalled product were distributed to consumers in the continental United States through online sales and direct delivery, as well as through retail sales at the Daily Harvest store in Chicago, IL, and a “pop-up” store in Los Angeles, CA. Samples were also provided to a small number of consumers. Daily Harvest emailed consumers who were shipped the affected product, and other consumers for whom the company had contact information and consumers were issued a credit for the recalled product. Consumers who may still have the recalled product in their freezers should immediately dispose of it.

On July 1, the FDA announced the recall and issued an advisory for these events.

Also on July 1,  Daily Harvest issued UPDATES ON OUR VOLUNTARY RECALL OF FRENCH LENTIL + LEEK CRUMBLES

Rachel here – I want to give you another update on the French Lentil + Leek Crumbles recall. As you know, we’ve been conducting exhaustive testing over the course of the last two weeks. Despite this, we still have not identified a possible cause. I am sorry that it’s taking as long as it is to pinpoint exactly what may have made people sick. We are deeply committed to finding answers for those impacted. We’re working with top doctors, microbiologists, toxicologists as well as 3 independent labs.   While additional testing is underway, results to date rule out the following:

• Hepatitis A

• Norovirus

• A range of mycotoxins, including aflatoxins

• Food-borne pathogens including Listeria, E.Coli, Salmonella, Staphylococcus Aureus (Staph), B.Cereus, and Clostridium Species

• Major allergens including egg, soy, milk, and gluten

I assure you, we will not stop until we get to the bottom of this. We’re continuing to work in close cooperation with the FDA, CDC and other health agencies. The FDA released an update on their investigation yesterday, which can be found here on their website.

I’m baffled.  I can’t understand why toxin testing hasn’t come up with anything.  The illnesses are real and all traced to this product.

The FDA’s recommendation: “Consumers should not eat, sell, or serve recalled products. Consumers who may still have the recalled product in their freezers should throw it away.”

Bill Marler agrees with don’t eat it, but he wants the product saved as evidence.  He has questions and suggestions:

• When did Daily Harvest first learn that its French Lentil + Leek Crumbles were causing Liver Failure?
• What to do if you have been or are sick after eating French Leek and Lentil Crumble  

His hypothesis: the Tara ingredient.

• Revive Superfoods no longer has Tara as a listed ingredient – what happened in the last 24 hours?
• Are Revive Superfood Smoothies linked to acute Liver Failure too?
• Is Reddit the new FDA? Is it the Tara?
• Hey, CDC, I have 175 people you should talk to

We believe that the illnesses may well be linked to a common ingredient called Tara that comes exclusively from Peru (this due because it is a unique ingredient to the French Lentil + Leek Crumbles AND to certain Revive Smoothies where people are reporting identical symptoms).

Here’s what Wikipedia says about Tara:

Tara gum…is produced by separating and grinding the endosperm of T. spinosa seeds…The major component of the gum is a galactomannan polymer similar to the main components of guar and locust bean gums that are used widely in the food industry….Tara gum has been deemed safe for human consumption as a food additive… Medicinal uses in Peru include gargling infusions of the pods for inflamed tonsils or washing wounds; it is also used for fevers, colds, and stomach aches. Water from boiled, dried pods is also used to kill fleas and other insects.

Bill Marler is on the case.  He has 175 clients so far.

• Marler Clark files first of hundreds of lawsuits against Daily Harvest
• Daily Harvest customer had gallbladder removed after eating frozen item: suit.
• Daily Harvest hit with lawsuit by woman who blames company for gallbladder removal
• Daily Harvest Faces Lawsuits Over Claims of Mystery Illness Causing Severe Pain and Gallbladder Failure

I’ve heard privately from people who experienced sickness after eating this product.  I’ve read about others like this one:

• Daily Harvest customer tried to warn CEO symptoms much worse than ‘gastrointestinal discomfort’

I wish everyone a speedy recovery, and hope the toxin gets identified soon.  Stay tuned.

Thanks to a reader in Israel, Yehuda Ben-Hur, for sending this one.

The study: The effect of a high-polyphenol Mediterranean diet (Green-MED) combined with physical activity on age-related brain atrophy: the Dietary Intervention Randomized Controlled Trial Polyphenols Unprocessed Study (DIRECT PLUS) .  Alon Kaplan, Hila Zelicha, Anat Yaskolka Meir, Ehud Rinott, Gal Tsaban, Gidon Levakov, Ofer Prager, Moti Salti, Yoram Yovell, Jonathan Ofer, Sebastian Huhn, Frauke Beyer, Veronica Witte, Arno Villringer, Nachshon Meiran, Tamar B Emesh, Peter Kovacs, Martin von Bergen, Uta Ceglarek, Matthias Blüher, Michael Stumvoll, Frank B Hu, Meir J Stampfer, Alon Friedman, Ilan Shelef, Galia Avidan, Iris Shai.  The American Journal of Clinical Nutrition, nqac001, https://doi.org/10.1093/ajcn/nqac001 Published: 11 January 2022.

Objectives: We aimed to explore the effect of a Mediterranean diet (MED) higher in polyphenols and lower in red/processed meat (Green-MED diet) on age-related brain atrophy.

Methods:  Abdominally obese  participants were randomly assigned to follow one of three diets: (1) healthy dietary guidelines (HDG), (2) MED, or (3) Green-MED diet.  The two MED groups consumed 28 g walnuts/d.  The Green-MED group consumed green tea , mankai (100 g frozen cubes/d as a green shake).  After 18 months, participants got MRI scans.

Results: Indicators of brain atrophy were attenuated in both MED groups, with the best outcomes among Green-MED diet participants.  Therefore, greater Mankai, green tea, and walnut intake and less red and processed meat were significantly and independently associated with reduced atrophy decline .

Conclusions: A Green-MED (high-polyphenol) diet, rich in Mankai, green tea, and walnuts and low in red/processed meat, is potentially neuroprotective for age-related brain atrophy.

Funding: Supported by German Research Foundation, Israel Ministry of Health, Israel Ministry of Science and Technology, and the California Walnut Commission (to I Shai, the senior author). “None of the funding providers were involved in any stage of the design, conduct, or analysis of the study, and they had no access to the study results before publication.”

Comment: I hardly know what to make of this study, which involves so many variables: mankai, (duckweed, supposedly a polyphenol-rich “supergreen”), green tea, walnuts, and low red/processed meat.  The MED groups were instructed to consume a calorie-restricted Mediterranean diet “rich in vegetables, with poultry and fish partly replacing beef and lamb.”  Physical activity instructions (and gym memberships) as well nutrition counseling was also part of this mix.

My questions:

• Why not test the Mediterranean diet on its own without all those polyphenol additives?
• Why walnuts as opposed to any other polyphenol-containing food?  Could sponsorship have anything to do with this choice?
• Why Mankai, which is traditionally a component of Asian diets, not Mediterranean?    Why are Israeli scientists so interested in this plant?
• Don’t classic Mediterranean diets provide enough polyphenols to be protective against brain atrophy?

I will be intersted to see further studies along these lines.

I saw this is a tweet from @WesternGrowers, the trade association that represents “local and regional family farmers growing fresh produce in Arizona, California, Colorado and New Mexico…We grow the best medicine in the world.®”

High marks to the Western Growers Association for producing this ad.

• It has interesting facts.  I did not know all this.
• It does not have misleading health claims about superfoods.

My one quibble: the confusing denominator.  The percentages can’t be of all of the vegetables consumed in the US; they have to be the percentages of US grown vegetables.

Take garlic, for example.  According to the USDA, we imported $19 million worth of dried garlic in 2020, and $185 million worth of fresh or chilled garlic.  Much of imported garlic comes from China.

According to Rural Migration News, the US imports almost two-thirds of its fresh fruit and one-third of its fresh vegetables.

Even so, I like the ad.

A reader in Norway, Marit Kolby, sent me this one.

First, the press release: “Mushroom consumption may lower risk of depression.”

New research led by Penn State College of Medicine also reveals that these superfoods may benefit a person’s mental health.  Penn State researchers used data on diet and mental health collected from more than 24,000 U.S. adults between 2005 and 2016. They found that people who ate mushrooms had lower odds of having depression.

The study: Mushroom intake and depression: A population-based study using data from the US National Health and Nutrition Examination Survey (NHANES), 2005–2016.  Djibril M.Ba. XiangGao, LailaAl-Shaar, Joshua, E.Muscat, Robert B.Beelman, John P.Richie.  Journal of Affective Disorders, Volume 294, 1 November 2021, Pages 686-692.

Hypothesis: “We hypothesized that mushroom consumption is associated with a lower risk of depression in American adults.”

Method: Analysis of dietary recall data from NHANES vs. self-reported depression.

Conclusion: “Mushroom consumers had a lower odd of depression. However, we did not observe a dose-response relationship.”

Funding: none.

Declaration of competing interest: none.

Comment: Ordinarily, beyond noting the conditional “may be linked” (which also could be “may not”  and the lack of dose-response, I would not bother to comment on this study except that Marit Kolby wrote:

As usual, the health effects (this time from mushrooms) are greatly exaggerated, especially given the study type and the lack of a dose-response relationship.  One compound in mushrooms suggested to explain the association is ergothioneine. The authors list no conflicts of interest.  But look at the patent list of the author Beelman.

This called for a look at the patent list.  Beelman does indeed hold several patents related to ergothioneine from mushrooms, but most of them are assigned to the Penn State Research Foundation.   This is not unusual for universities, but called for a look at Penn’s State’s policy on faculty intellectual property.

Penn State’s policy on patents requires research faculty to negotiate patent income according to a formula.

1. PSRF [the foundation]: 40%
   Inventor(s): 40%
   Administrative Unit of College: 20%
2. The inventors’ portions of the income are divided according to the contribution percentage that the inventors establish. A memo to establish the percentages to be paid to each invention will be sent to the Inventors before making payment .

Without knowing the details of Beelman’s arrangement with the university, it is difficult to be sure that a conflict of interest exists (he might have turned all the proceeds over to the university), but this situation clearly gives the appearance of a conflict, and an undisclosed one at that.

If professor Beelman is entitled to any percentage of profits from the patents, he has a competing interest and should have disclosed it.

Regardless, his declaration should have acknowledged his patent ownerships, as should the university’s press release.

Are mushrooms a “superfood” as the press release maintains?

Marit Kolby thinks it is more likely that mushrooms are an indicator of usual consumption of whole rather than ultra-processed foods, and points out that a couple of studies have linked ultra-processed foods themselves to depression.

I learned about this study from an article in FoodNavigator.com, “Baobab industry welcomes study linking the fruit to good gut health.”

The title raised the question, “Who funded this?”  Bingo, as it turns out.

Baobabs are enormous African trees that produce a highly fibrous fruit.

I can’t say it looks particularly yummy.  In fact, it is described as “floury, dry, and powdery” and works best as a powdered ingredient.

But the baobab industry?  Who knew such an entity existed?

It does.  Hence this study:

The study: A Pectin-Rich, Baobab Fruit Pulp Powder Exerts Prebiotic Potential on the Human Gut Microbiome In Vitro.  Martin Foltz, Alicia Christin Zahradnik, Pieter Van den Abbeele, Jonas Ghyselinck, Massimo Marzorati.  Microorganisms. 2021 Sep 17;9(9):1981.

Methods: Test tube mixing of baobab powder with colonic bacteria.

Results: Baobab fruit pulp powder boosted colonic acidification across three simulated human adult donors due to the significant stimulation of health-related metabolites.

Conclusions: Overall, Baobab fruit pulp powder fermentation displayed features of selective utilization by host microorganisms and, thus, has promising prebiotic potential.

Funding: The studies described in this manuscript were performed at the request of and were funded by Döhler, 94295 Darmstadt, Germany  Surprise!  This company makes baobab powder.

Conflict of interest:  M.F. and A.C.Z. are employees of Döhler. While M.F. participated in the design of the study, the interpretation of the data, and the revision of the manuscript, M.F. did not participate in the collection and analyses of data.

Comment: No food, product, or ingredient is too obscure to avoid industry attempts to demonstrate that it can be marketed as a “superfood” (see, for example, this product).

Reference: For a summary of research on the “funding effect”—the observation that research sponsored by food companies almost invariably produces results favorable to the sponsor’s interests but that recipients of industry funding typically do not recognize its influence—see my book, Unsavory Truth: How Food Companies Skew the Science of What We Eat.

I know I’ve already posted one of these this week, but this one is too good not to share.

Let’s start with the press coverage: Snack yourself young: Study investigates the effects of daily almond consumption on wrinkles

A study by American research found that eating almonds daily reduces wrinkle severity – along with improving skin pigmentation – in postmenopausal women.

The 2021 study – published in Nutrients and funded by the Almond Board of California – expands upon findings of a 2019 study​​ that found there may be more than one reason to add almonds to a daily skin care routine.​​

And here’s the study in question: Prospective Randomized Controlled Trial on the Effects of Almonds on Facial Wrinkles and Pigmentation.  Authors: Sivamani RK, Rybak I, Carrington AE, Dhaliwal S, et al.  Nutrients. 2021; 13(3):785

This is not their first on this topic.  See: Prospective randomized controlled pilot study on the effects of almond consumption on skin lipids and wrinkles.  Author: Sivamani RK, Foolad N, Vaughn AR, Rybak I, et al   Phytother Res. 2019 Dec;33(12):3212-3217

Nor are these the first studies to link specific foods to wrinkle prevention.  I’ve written previously about a study on mangos and wrinkle prevention, sponsored—of course—by a mango trade association.

I wish companies and trade associations would stop doing studies of one food and some health outcome. Diets that contain reasonable proportions of fruits, vegetables, and whole grains are demonstrably healthy.  Can any one food really make all that much difference?

The sellers of these foods would like you to think they are “superfoods.”  Alas, no such thing exists.  But it’s a great marketing strategy.

As for sponsored research in general?

For a summary of research on the “funding effect”—the observation that research sponsored by food companies almost invariably produces results favorable to the sponsor’s interests but that recipients of industry funding typically do not recognize its influence—see my book, Unsavory Truth: How Food Companies Skew the Science of What We Eat.

Pet foods may seem unrelated to food politics but they constitute a vital part of the food system  For one thing, they use up a large part of the byproducts of human food production that would otherwise be wasted.

They also are big business.  The US pet foods brought in $99 billion in sales in 2020.

Nestlé (no relation) is one of the largest pet food producers.  As Quartz puts it, Nestle’s big bet on pet food is paying dividends during the pandemic.

A beloved animal friend for you means big business for Nestle. According to an earnings report released today, the Swiss company reported 3.5% organic growth so far in 2020, and 4.9% growth in the third quarter, its highest level of quarterly growth in the past six years…its pet food brand, Purina PetCare, was a main contributor in each of the company’s global markets, growing 10.6% so far this year, CFO Francois-Xavier Roger said on a call for investors.

To my great amusement, pet food marketing closely follows current food fads.  Why am I amused?  Dogs don’t care what they eat, but their humans do.

• Cell-based meat for pets: A handful of startup companies are using cell-based meat in pet food, a large market now supplied by food-bearing animals; one uses cells from mice for cat food and cells from rabbits for dog food. (Modern Farmer)
• Unleash the Power of Postbiotics in Pets:  Pet parents continue to turn towards natural foods, recognizable ingredients, and supplements. As this trend and purchasing pattern continues, we see another ingredient category emerge – Postbiotics.  Read more

And we now have insect-based pet foods.

• Insect protein demand by pet food may be 165k tons by 2030:  As a pet food ingredient, insect meal can serve as an alternative protein source for dogs and cats with allergies or sensitivities. The pet food market currently accounts for the largest share of demand for insect protein and is likely to remain one of the largest, one industry professional said.Read more
• Insect-based pet foods not risk for zoonotic pandemic:  A team of researchers at Ÿnsect has been working to assess potential risks from mealworm farming operations.  Read more
• Insect-based pet food news: Like insects themselves emerging in spring, insect-based pet food ingredient suppliers and the products that use them have been active lately. Mars Petcare plans to introduce an insect-based cat food, Lovebug, in the United Kingdom.

Pet food safety is an ongoing issue, particularly from Salmonella contamination.  What interested me about this particular recall—Billy+Margot Wild Kangaroo and Superfoods Recipe Dog Food—was its main ingredient, wild kangaroo, and that it is being marketed as a superfood (no such thing exists).

If you have purchased Billy+Margot Wild Kangaroo and Superfoods Recipe in a 4 lb bag, with lot code V 07 Feb 2022 from any retail store nationally, please stop feeding the product to your dogs, dispose of this product immediately, wash your hands accordingly, and sanitize affected surfaces.

Weight loss in dogs and owners:  If one loses weight, the other does too!

My ongoing interest in this topic is a result of having written two books about pet foods:

• Pet Food Politics: The Chihuahua in the Coal Mine (2008)—an account of the pet food recalls of 2007 and their implications for the health of dogs and cats, but also for the FDA, food safety policy in the United States and China, international food trade, and the pet food industry itself.
• Feed Your Pet Right (with Malden Nesheim, 2010)—an examination of the booming pet food industry—its history, constituent companies, products, and marketing practices.