by Marion Nestle

Search results: USDA meat

Feb 17 2012

Some thoughts on the “fire Mike Taylor” petitions

USA Today has picked up the various Internet petitions—SignOn, FoodDemocracyNow, CredoAction, etc— to fire Mike Taylor, the head food safety person at the FDA. 

When the FDA hired Mike Taylor nearly three years ago, I wrote a long post reviewing his complicated employment history: Monsanto, FDA, USDA, Monsanto, private sector, university, FDA—a classic example of the “revolving door.”.    

He was at FDA, although recused, when the agency approved GM foods and denied labeling. 

But at USDA, he was a public health hero to food safety advocates.  He was responsible for installing food safety oversight systems that have greatly reduced contamination outbreaks from meat and poultry.

 He was hired at FDA to do the same thing, which is why I thought his appointment made sense at the time.  I thought he ought to be given a chance.

 He has now become the flashpoint for public anger at FDA over issues that include GM foods but go well beyond them:

  • Failure to require labeling of GM foods
  • Failure to recognize the scaled-down safety needs of small farmers
  • Failure to enforce and punish food safety violations by large producers
  • Unfair enforcement of food safety procedures against small producers
  • Clamping down on raw milk producers

As I explained to USA Today, I’m a big fan of MoveOn and grass-roots political action, and I’ve been advocating for GM labeling since I was on the FDA Food Advisory Committee in 1994 (if only they had listened to me).

But I don’t exactly get where the “fire Monsanto Mike” movement is coming from nearly three years after he was hired.   Why make the political so personal?

As I told USA Today,

What would firing Mike Taylor do? It would show the muscle of the anti-corporate food movement, says Nestle, “and there’s much to be said for that.” However, she questions whether Taylor leaving would do anything to advance the goals of this loose coalition of activists. “Will it make the FDA listen more carefully to demands that it keep its priorities where the most serious food safety problems are? I don’t know.”

All of the issues mentioned in the petitions are important.  All are complicated.  All deserve serious thought and attention to political goals.  Will firing Mike Taylor advance those goals? 

I don’t see how.

What am I missing here?

 

Jan 17 2012

Rumor: a single food safety agency at long last?

According to rumors passed along by Dan Flynn at Food Safety News via the Hagstrom Report (an agricultural subscription news service costing $999 a year), the Office of Management and Budget wants to merge federal agencies, among them the food safety components of FDA and USDA.

Rumors are that the Obama administration wants to do this to make “food safety independent of USDA, which primarily exists to market and promote American farm products.”

If this happens, it could be one major benefit of cost-cutting measures.  At the moment, USDA gets about three quarters of the total appropriation for food safety (for roughly one quarter of the food supply) whereas FDA gets one quarter of the appropriation for three quarters of the food supply.

This inequity is a result of the way Congress funds the FDA—through agricultural appropriations committees, not, as any sensible person might expect, through health committees (this too needs to change).

The merger also would eliminate the dysfunctional distinctions between regulations for meat and poultry (USDA) and practically all other foods (FDA).   A merged agency could deal with the unpleasant fact that animal waste is the cause of many food safety problems with fruits and vegetables.

The idea of a single food safety agency is not new.  The Government Accountability Office (GAO) has been calling for its creation since 1990 or earlier, most recently in 2011.

In the 2011 report, GAO said, as it has for years:

Fragmented food safety system has caused inconsistent oversight, ineffective coordination, and inefficient uses of resources…The Department of Agriculture’s (USDA) Food Safety and Inspection Service and the Food and Drug Administration are the primary food safety agencies, but 15 agencies are involved in some way.

These, GAO points out, administer at least 30 food-related laws.

In addition, GAO urges Congress to ask the National Academy of Science to consider several organizational structures that might work better than the current system:

  • A single food safety agency, either housed within an existing agency or established as an independent entity, that assumes responsibility for all aspects of food safety at the federal level
  • A single food safety inspection agency that assumes responsibility for food safety inspection activities, but not other activities, under an existing department, such as USDA or FDA
  •  A data collection and risk analysis center for food safety that consolidates data collected from a variety of sources and analyzes it at the national level to support risk-based decision making
  • A coordination mechanism that provides centralized, executive leadership for the existing organizational structure, led by a central chair who would be appointed by the president and have control over resources

The rumors do not say which of these options is favored.

Not everyone is as enthusiastic about a single food safety agency as I am, in part because this and other issues remain to be resolved: where the new agency would go and what its resources might be.

And, as food safety lawyer Bill Marler points out, legal matters are also at stake:

We can’t overlook the legal issues in food safety. Right now there are too few legal consequences for sickening or killing customers by selling contaminated food. We should impose stiff fines, and even prison sentences, for violators, and even stiffer penalties for repeat violators.

So, let’s make some progress in stopping food poisoning and then later pick out the new stationery.

Former USDA official Richard Raymond, writing in Food Safety News argues:

It is my sincere belief that a merger of the two food safety agencies would be an unmitigated disaster in the short term because the cultures are so very different. And unless megadollars flowed with the merger, nothing more could be accomplished than is currently done.

And there are dozens of other valid reasons to “just say no” to the Administration’s thinking.

He suggests reading the comment posted on Dan Flynn’s article from Carol Tucker Foreman, also a former USDA official and a long-time food safety advocate.

The major point of her very long comment is that moving USDA’s meat and poultry inspection responsibilities to FDA

Would likely reduce the current level of health protection provided by food safety laws and curtail the progress that has been made in reducing foodborne illness.

The FDA, saddled by lack of funds, sufficient legal authority, and food safety leadership has been criticized…for its inability to provide a decent level of food safety protection in the domestic and imported food products it regulates.

…Today the FSIS [USDA] has surpassed the FDA in some areas. The agency has adequate resources and high official status in a relatively small Cabinet agency…FDA, despite its new law, is still strapped for funds, burdened by its low position at HHS and the need to manage multiple agendas…Reorganization would not address the continuing problems of either agency.

…We’re confident that trying to move other agencies to the FDA or HHS won’t save money. In fact we are confident it would reduce the effectiveness of the meat and poultry inspection program…leading to a potential increase in foodborne illness and the related costs. That makes it bad policy and a bad bargain.

But what if the new hypothetical single food safety agency does not go to FDA?  What if it goes someplace independent of either agency?   And what if the new entity started out with the highest possible safety standards, funded adequately?

If we are dealing with rumors, we can deal with dreams too, no?

Update, January 29Food SafetyNews says all rumors are false.  This isn’t going to happen because the meat industry doesn’t want it to happen.

 

 

Jan 4 2012

Peevish about “protein”

Reading the New York Times dining section this morning kicked up my annoyance at use of the term “protein” to refer to meat.  A story about what to do with holiday leftovers says “…repurposing top-quality proteins into dinner is easier than it seems.”

Another on Simon Doonan’s new book, Gay Men Don’t Get Fat, quotes him as pointing out that “straight food…tends to be leaden, full of protein, thick with fat.” Now you know.

But protein is a nutrientFoods are sources of nutrients.

Nutritionists like me consider protein a “macronutrient,” meaning that foods contain many grams of protein and also that protein is a source of calories (4 per gram as opposed to 9 for fat and 4 or so for carbohydrate).

Diets contain about 15% of calories from protein on average, an amount much greater than most people need—about twice the minimum required for maintenance and growth.

“Protein” is most definitely not a synonym for meat or even tofu (see table).  I’ve listed the plant sources of protein in Italics.

FOOD SOURCES OF PROTEIN IN U.S. DIETS

PROTEIN SOURCE % TOTAL PROTEIN
Poultry 17
Dairy 16
Refined grains 15
Beef 11
Seafood  7
Pork  6
Vegetables  6
Whole grains  4
Eggs  4
Fruit  2
Nuts and seeds  2
Sweets  2
Legumes (beans, peas)  1

Source: J Am Diet Assoc. 2010 February ; 110(2): 291–295.

Grains, vegetables, and fruits are not the biggest sources, but they are important contributors.  Vegans, who consume no animal products at all, do not lack for protein.

And while proteins from meat resemble our own proteins more than do proteins from vegetables, their constituent amino acids are the same in all foods.  Varying food intake and eating enough food takes care of amino acid balance.

Hence, my peevishness at the use of “Protein” as a separate category in USDA’s MyPlate (see previous post).

Grains and dairy, each with its own sector, are important sources of protein in American diets.

Why protein?  USDA used to call the group “meat” even though it contained beans, poultry, and fish.  The meat industry ought to be happy about “protein.”  Meat producers have spent years trying to convince Americans to equate meat with protein.

A plea: let’s keep terms clear and talk about nutrients when we mean nutrients and foods when we mean foods.  Protein is not food.

NOTE: More about protein tomorrow when I discuss the new JAMA study on whether high-protein diets help you lose weight (spoiler alert: they don’t).

Dec 29 2011

Food safety: it’s déjà vu all over again

In preparation for the holiday season, Secretary of Health and Human Services Kathleen Sebelius and Agriculture Secretary Thomas Vilsack held a press conference  to promote the departments’ efforts on food safety.

They announced release of the administration’s progress report from its Food Safety Working Group.

They also highlighted additional places to get government information about food safety at home:

I didn’t pay much attention to these announcements until I read the slightly snarky account in Food Chemical News (December 22). 

The Obama administration patted itself on the back today with a new report that both lists the accomplishments over the past three years of its Food Safety Working Group (FSWG) and identifies the group’s top priorities for the coming year.

Released just minutes before a short media call that served as more of a pep rally, The Federal Food Safety Working Group Progress Report, a 31-page document, summarizes for stakeholders a host of activities that have taken place at government agencies over the past three years related to detecting foodborne pathogens, enhancing surveillance, responding to food safety problems, improving food safety at the retail level and educating consumers.

The list of the administration’s food safety accomplishments is long and detailed, and many are impressive.

But what the report does not say is telling.  Neither the USDA nor FDA have the resources or power to require the industries they supposedly regulate to produce safe food.

As Mark Bittman explains in his Opinionator column in the New York Times, politics defeats even the most rational and thoroughly science-based safety measures, leaving the FDA unable to do much more than politely request “voluntary guidance” of industry.

Bittman focuses on the political barriers to doing what the FDA has been asking for since 1977:  a ban on the use of antibiotics for non-therapeutic purposes, in this case to make food animals grow faster.   The result: “Bacteria 1, FDA 0.”

Here’s the nut: The F.D.A. has no money to spare, but the corporations that control the food industry have all they need, along with the political power it buys.

That’s why we can say this without equivocation: public health, the quality of our food, and animal welfare  are all sacrificed to the profits that can be made by raising animals in factories….Animals move from farm to refrigerator case in record time; banning prophylactic drugs would slow this process down, and with it the meat industry’s rate of profit.

Lawmakers beholden to corporate money are not about to let that happen, at least not without a fight.

For more than 20 years, the Government Accountability Office has called for creation of a single food safety agency that unites the safety oversight functions of the FDA and USDA and has the authority to require food to be produced safely.

In this Congress?  Hopeless.

But Congress can be changed—and that’s a worthy thought for the new year.

 

 

Nov 8 2011

Food politics semantics: the meaning of “natural”

Are you puzzled, annoyed, or irritated beyond belief by the word “natural” on food product labels?

FoodNavigator must think so.  It conducted an opinion survey on what to do about marketing foods as “natural”.

FoodNavigator asked: Do we [food companies] need a clearer definition of ‘natural’ for food marketing?

The response options:

  • Yes. The FDA should come up with a formal definition (63% checked this one)
  • Yes. The industry should develop voluntary guidance (20%)
  • No. The FDA’s 1993 guidance is sufficient (~1%)
  • No. The term is meaningless and manufacturers should stop using it (16%)

Hello FDA.  How about it?

The FDA has never defined “natural” for labeling purposes.  But it does have an answer to the question “what is the meaning of ‘natural’ on the label of a food,” one that requires self-cancelling nots (my emphasis):

From a food science perspective, it is difficult to define a food product that is ‘natural’ because the food has probably been processed and is no longer the product of the earth.

That said, FDA has not developed a definition for use of the term natural or its derivatives. However, the agency has not objected to the use of the term if the food does not contain added color, artificial flavors, or synthetic substances.

By this non-definition, High Fructose Corn Syrup is “natural” even though to make it, corn refiners must extract the starch from corn, treat the starch with an enzyme to break it into glucose, and treat the glucose with another enzyme to turn about half of it into fructose.

This is “natural,” according to the FDA, because the enzymes are fixed to a column, do not actually mix with the starch, and HFCS does not contain added colors or flavors.

In contrast, the USDA is way ahead and has defined what “natural” means for meat and poultry products.  “Naturally raised” means  no growth promoters, antibiotics, animal by-products, or fish by-products.

The USDA says meat and poultry products can be labeled “natural” if they are only minimally processed and don’t have any artificial flavorings, colorings, preservatives, or other additives.

As I’ve discussed previously, Horizon Organics now has “natural” milk that does not meet standards for organic certification.  It must hope that consumers can’t tell the difference.

To do something about this confusing situation, FoodNavigator reports that  the Natural Products Association (NPA) is developing standards for use of the word “natural” in food marketing.  This will be similar to the NPA’s Natural Seal Certification for personal home-care products.  NPA is doing this to “give consumers confidence that foods featuring the seal adhere to clear set of standards.”

NPA has not yet worked out the details but says some ingredients are unlikely to qualify:  those extracted with organic solvents, modified starch, high fructose corn syrup, and partially hydrogenated vegetable oils.

Oops.  What about GMOs?  NPA hasn’t decided yet, mainly because it is so hard to find soy products that are not GMO.

This situation is a mess and runs the risk of undercutting organic standards.  And we hardly need another certification system.

It’s time for the FDA to step in and give the food industry—and the public—some guidance about what counts as “natural” and what does not.

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Aug 16 2011

The fuss over saturated fat

I keep getting questions about saturated fat.  Does it really pose a health risk?  If so, how serious a risk?  And isn’t eating real food OK even if it contains saturated fat?  Good questions.  Here are a couple of recent examples:

Reader #1: I think that the idea that saturated fats in meat and dairy are unhealthful is errant, based on correlative – not causative – scientific studies…I propose that instead of demonizing one nutrient over another, we favor whole, high-quality foods of both animal and plant origin…designed by nature (and thousands of years of trial and error) to meet the needs of their respective populations. What do you say?

Reader #2: I wonder how the government can be so focused on low-fat milk. Is that really such a huge problem? Isn’t the bigger problem that the state of NY is telling people pretzels make a healthy snack? Isn’t it soda and cheese doodles and eating every dinner from a box that is the problem? Whole milk, really? I’d appreciate your clarity on this… we are full fat milk and cheese people, and all of this perplexes me.

I can understand why anyone might be confused about saturated fat.  Food fats are complicated and it helps to be a biochemist (as I once was) to sort out the issues related to degree of saturation and whether the omegas are 3, 6, or 9 (I explain all this in the chapter on fats and in an appendix to What to Eat).

And yes, the science is complex and sometimes seems contradictory but scientific committees for the past 50 years have concluded one after another that substituting other kinds of fatty acids for saturated fatty acids would reduce levels of blood cholesterol and the risk for coronary heart disease.

And no, those scientists cannot have all be delusional or paid off by the meat or dairy industries.  They—like scientists today—mostly call the science the way they see it.

What makes the research especially hard to sort out is that all food fats—no exceptions—are mixtures of saturated, unsaturated, and polyunsaturated fatty acids (just the proportions differ), that some saturated fatty acids raise blood cholesterol levels more than others do, and that one kind—stearic acid—seems neutral with respect to blood cholesterol.

But overall, the vast majority of expert committees typically conclude that we would reduce our heart disease risks if we kept intake of saturated fat below 10% of calories, and preferably at or below 7%.   On average, Americans consume 11-12% of calories from saturated fat, which doesn’t sound too far off but the average means that many people consume much more.

As is often the case with studies of single nutrients, research sometimes comes to different conclusions.  Several studies—all quite well done—have appeared just in the last year or so.

One of these is a meta-analysis (a review of multiple studies). It concludes:

…there is no significant evidence for concluding that dietary saturated fat is associated with an increased risk of CHD [coronary heart disease] or CVD [cardiovascular disease]. More data are needed to elucidate whether CVD risks are likely to be influenced by the specific nutrients used to replace saturated fat [my emphasis].

What saturated fat gets replaced with is the subject of three other well conducted studies that come to a different—the mainstream—conclusion.  One, another recent meta-analysis, confirms decades of previous observations (sorry about the annoying abbreviations):

These findings provide evidence that consuming PUFA [polyunsaturated fatty acids] in place of SFA [saturated fatty acids] reduces CHD events in RCTs [randomized clinical trials]. This suggests that rather than trying to lower PUFA consumption, a shift toward greater population PUFA consumption in place of SFA would significantly reduce rates of CHD.

Translation: replacing saturated fats with polyunsaturated fats would be healthier.

Another meta-analysis comes to the same conclusion:

The associations suggest that replacing SFAs with PUFAs rather than MUFAs [monounsaturated fatty acids] or carbohydrates prevents CHD over a wide range of intakes.

A very recent consensus statement concludes:

the evidence from epidemiologic, clinical, and mechanistic studies is consistent in finding that the risk of CHD is reduced when SFAs are replaced with polyunsaturated fatty acids (PUFAs). In populations who consume a Western diet, the replacement of 1% of energy from SFAs with PUFAs lowers LDL cholesterol [the “bad” kind] and is likely to produce a reduction in CHD incidence of ≥2–3%. No clear benefit of substituting carbohydrates for SFAs has been shown, although there might be a benefit if the carbohydrate is unrefined and has a low glycemic index.

The advisory committee to the 2010 Dietary Guidelines for Americans reviewed this and other research relating saturated fatty acids to heart disease risk and concluded:

Cholesterol-raising SFAs, considered SFA minus stearic acid…down-regulate the low density lipoprotein (LDL) receptor by increasing intracellular cholesterol pools and decreasing LDL cholesterol uptake by the liver.

The committee’s research review addressed the question, “What is the Effect of Saturated Fat Intake on Increased Risk of Cardiovascular Disease or Type 2 Diabetes, Including Effects on Intermediate Markers such as Serum Lipid and Lipoprotein Levels?”  It judged the evidence strong

that intake of dietary SFA is positively associated with intermediate markers and end point health outcomes for two distinct metabolic pathways:

1) increased serum total and LDL cholesterol and increased risk of CVD and

2) increased markers of insulin resistance and increased risk of T2D [type-2 diabetes]. Conversely, decreased SFA intake improves measures of both CVD and T2D risk.

The evidence shows that 5 percent energy decrease in SFA, replaced by MUFA or PUFA, decreases risk of CVD and T2D in healthy adults and improves insulin responsiveness in insulin resistant and T2D individuals.

How much saturated fat might increase the risk of heart disease or type-2 diabetes depends on how much you eat as well as what you eat.

What to do to reduce your dietary risks for heart disease?  Take a look at the top 15 sources of saturated fats in U.S. diets:

  • Regular cheese
  • Pizza
  • Grain-based desserts (cakes, cookies, pies, pop-tarts, donuts, etc)
  • Dairy desserts
  • Chicken and chicken mixed dishes (e.g. fingers)
  • Sausage, franks, bacon, and ribs
  • Burgers
  • Mexican mixed dishes
  • Beef and beef mixed dishes
  • Reduced fat (not skim) milk
  • Pasta and pasta dishes
  • Whole milk
  • Eggs and egg mixed dishes
  • Candy
  • Butter
  • Potato/corn/other chips
  • Nuts/seeds and nut/seed mixed dishes
  • Fried white potatoes

Explanation: These foods do not necessarily have the most saturated fat.  If the list surprises you, recall that all food fats have some saturated fats.  These foods are leading sources because they contain some saturated fat and many Americans eat them.

It is surely no coincidence that these foods are also among the leading sources of calories in U.S. diets.  The health effects of diets, let me repeat, have to do with quantity as well as quality.

If you do not habitually eat most of the foods on this list, and are not gaining weight, saturated fatty acids are much less likely to be a problem for you.

And just because saturated fats raise the risk of heart disease does not mean they are poisons.   Eat fats.  Just not too much.

 

 

 

Aug 11 2011

Q. What’s with the turkey recall? A. Same old, same old

I’ve been rounding up information about the Cargill recall of ground turkey contaminated with Salmonella Heidelberg.  William Neuman at the New York Times related the story on August 3. Same old same old.

Cargill is a huge company with, as Bill Marler counts them, a long history of food safety problems.  Did Cargill not bother to test for pathogens?   As I explain in my book Safe Food: The Politics of Food Safety, no meat company wants to test for pathogens.  If they found pathogens, they would have to recall the products.

And where was the USDA in all of this?  Best not to ask.

The USDA was testing.  The testing found Salmonella.  The USDA did nothing.

According to the Wall Street Journal,

Federal officials said they turned up a dangerous form of salmonella at a Cargill Inc. turkey plant last year, and then four times this year at stores selling the Cargill turkey, but didn’t move for a recall until an outbreak killed one person and sickened 77 others.

How come?

Food-safety specialists said the delay reflected a gap in federal rules that don’t treat salmonella as a poisonous contaminant, even if inspectors find antibiotic-resistant forms such as the Heidelberg strain implicated in the latest outbreak.

But CDC investigations show that turkey-related illnesses have been reported for months.  Despite the reports, the USDA took its own sweet time insisting on a recall.

The rationale for the delay is—get this—the USDA believes it does not have the authority to order recalls for any contaminant except E. coli O157:H7.  It has no authority to recall meat contaminated with Salmonella or other toxic forms of E. coli.

Or at least that’s how USDA interprets the legal situation (for the history of all this, see Bill Marler’s summary.

One reason for the USDA’s foot-dragging must surely be pressure from the meat industry which wants as little testing as possible and preferably none.  The meat industry would rather leave it up to you to cook your food safely.

According to a report by Elizabeth Weise in USA Today,

The reasons these bugs aren’t currently regulated are a mix of politics, money and plain biology — the bacteria are constantly evolving and turning up in new and nastier forms, making writing rules about them a bit of a nightmare. For example, the German E. coli variant that sickened more than 4,075 in Europe and killed 50…wasn’t known before this spring.

The meat industry takes advantage of this situation and argues:

“We don’t have a true baseline determining the prevalence of these organisms in the beef supply,” says Betsy Booren of the American Meat Institute (AMI) Foundation, the research arm of AMI. Without knowing how common they are, it’s impossible to say whether they should be considered adulterants, she says.

What they seem to be saying is that meat always has bacteria on it.  And just because these particular bacteria can kill people doesn’t mean the industry is responsible if anyone gets sick.  But shouldn’t the industry be doing a better job?

In Food Safety News, Michele Simon has a terrific analysis of the safety loopholes that allow this absurd situation to continue:

How did the meat industry get so powerful that it can keep USDA from doing its job? Now, instead of preventing illnesses from occurring by requiring testing with teeth, we have USDA regulations that are so lax they allow almost half the samples tested at ground turkey plants to be contaminated with Salmonella — a pretty easy standard to meet. And one that allowed this outbreak to occur.

I keep asking: how much worse does it have to get before Congress does something about ensuring safe food.  Cargill’s inability to protect the public from unsafe meat is reason alone to create a single food safety system that unites the functions of USDA and FDA.

If Congress isn’t ready to take that step, it could at least give USDA the power to act and the FDA the funding it needs to do its job.

Aug 8 2011

It’s time for some Q and A’s

I’ve just turned in the copy-edited manuscript of Why Calories Count: From Science to Politics (pub date March 2012) and now have time to catch up on some questions:

Q. I was recently given to read a book titled “The China Study” which is based on research conducted in 1970’s in China by Dr. Colin Campbell. His main conclusion is that eating dairy and meat causes cancer. His resolution is that a plant-based diet (i.e. vegan) is the (only?) healthy diet for humans. This book has made strong enough of a point to convince several of my friends to “convert” to a vegan diet in order to save their health. Could you share some comments on the validity of the research and conclusions this book presents with regards to detrimental effects of dairy and meat on human health?

A. Campbell makes a forceful argument based on his interpretation of the research and on case studies of people whose diseases resolved when they became vegans. And yes I’ve seen Dr. Campbell’s new movie, Forks over Knives. The first half is a terrific introduction to how the current food environment promotes unhealthy eating.  The second half promotes Dr. Campbell’s ideas about the hazards of meat and dairy foods.

Whether you agree with these ideas or not, the film is well done and worth a look.

Some scientists, however, interpret the research as demonstrating that people are healthier when they eat dairy foods.  For example, the enormous consensus report on diet and cancer risk from the American Institute for Cancer Research and the World Cancer Research Fund concluded in 2007 that eating lots of red meat and processed meat is convincingly associated with an increased risk of colorectal cancer (but no others).

On the other hand, they found dairy foods to be associated with a decrease in the risk of colorectal cancer.  They found limited and less convincing evidence that dairy foods might decrease the risk of bladder cancer but increase the risk of prostate cancer.

How to make sense of this?  These are two food groups in the diets of people who consume many kinds of foods and who do many things that might increase or decrease cancer risk.  Given this complexity, one food or food group seems unlikely to have that much influence on cancer when considered in the context of everything else people eat and do.

Nutrition research, as I am fond of saying, is difficult to do and requires interpretation. Intelligent people can interpret the studies differently depending on their point of view.

The new Dietary Guidelines say to cut down on saturated fats. Those are most plentiful in meat and dairy foods (plant foods have them, but in smaller amounts). Pretty much everyone agrees that plant-based diets promote health/  But whether they have to be 100% plant-based is highly debatable.

The new USDA MyPlate food guide suggests piling plant foods—fruit, vegetables, and grains—on 75% of your plate so the argument is really about what goes on the remaining 25%, what USDA calls the  “Protein” section. You can put beans in that quarter if you don’t want to eat red meat, poultry, or fish.

Q. I’d love to hear your take on the recent walnut flap [accusations that the FDA now considers walnuts to be drugs].  I suspect walnuts got caught with such offenders as Pom, Froot Loops, and Juicy-Juice, but I’d love to find out what the FDA actually said about this. For some odd reason I don’t believe the article is presenting the whole truth.

A. This is a health claims issue. The FDA is not saying walnuts are drugs. It is saying that Diamond Walnut is claiming walnuts as drugs on package labels. How so?

The labels say the omega-3 fatty acids in walnuts may help lower cholesterol; protect against heart disease, stroke and some cancers (e.g. breast cancer); inhibit tumor growth; ease arthritis and other inflammatory diseases; and even fight depression and other mental illnesses. These are disease claims for which the FDA requires scientific substantiation.

The company’s petition did not provide that substantiation so the FDA issued a warning letter. In general, you should be skeptical any time you see a nutritional factor advertised for its ability to prevent or treat such a broad range of problems.

Q. A question about sugar and how it is counted: My books say: 4 g = 1 teaspoon = 15 calories. My Illy Caffe says 10 g of sugar, but 50 calories. Ingredients: coffee, sugar, potassium bicarbonate, potassium citrate. If the drink is 50 calories, shouldn’t it say 12 g or more for the sugar listing?

A. Sugar should be the only ingredient that has calories in this coffee but I’ve seen calorie lists that say 5 calories per gram for sugars. Food companies have some leeway in the way they compute calories. Illy may be using a method that gives 5 rather than 4. But the difference between 40 and 50 is hardly measurable and I wouldn’t worry about amounts this small, annoying as imprecise figures may seem.