Currently browsing posts about: Fish

This morning’s Politico Pro Morning Agriculture says that FDA menu labeling (see Monday’s Post) is not the only food rule being held up by the White House.

The issue: The White House is supposed to sign off or reply within 90 days, or formally request an extension.  That’s not happening with menu calorie labeling or four others:

• The Common or Usual Name for Raw Meat and Poultry rule: this refers to what you can call meat and poultry with added water, salt or other ingredients.  The White House has been sitting on rule for review since April 30.   Chicken producers love it.  Some meat producers don’t.  Here’s the initial proposal.  It’s not clear whether or how it’s been altered.
• Child Nutrition Program Integrity and Child and Adult Care Food Program proposals: these rules, also sent in April, deal with USDA’s implementation of the Healthy Hunger Free Kids Act. The integrity rule deals with mismanagement.  The other one requires USDA to update the meals to comply with dietary guidelines every 10 years.
•  USDA’s catfish inspection rule: Sent to the White House on May 30, this would implement a section of the 2014 farm bill that puts USDA, not FDA, in charge of catfish inspections (see previous post on this).
• EPA’s Renewable Fuel Standard for 2014: This was sent August 22.  The White House has not extended the review period.  f the administration does take more time to officially complete its review, it could push the release of the rule governing how much ethanol needs to be mixed into gasoline for 2014 into 2015.

What’s going on?  Politics, of course.  But I can only speculate on what they might be.

In June I wrote about the FDA’s advice to pregnant women to avoid eating fish high in methylmercury.  The advisory said to avoid the four fish highest in methylmercury:  shark, swordfish, king mackerel, and tilefish.

I was surprised that the advisory didn’t warn about the high mercury levels in albacore tuna, and I was skeptical about the FDA’s  insistence that pregnant women must eat fish.

Now Consumer Reports advises pregnant women not to eat tuna at all.

Consumer Reports:

• Asks  FDA Deputy Commissioner Mike Taylor to fix the charts it released with its advisory to make it clear that tuna is a high-mercury fish
• Issues copies of the charts showing amounts of methymercury in various kinds of fish.
• Publishes an article on the problems with mercury in fish.
• Gives the methods used as a basis for the article.

So what’s going on here?

In my book, What to Eat, I included a chapter on this very topic: “The Methylmercury Dilemma.”  Here’s a quote:

Albacore tuna clearly belonged on the list of fish to avoid, but advice to restrict its consumption would surely affect the livelihoods of people who fish for, can, and sell tuna.   Because hardly anyone knows the difference between one kind of tuna and another, fish companies worried that consumers would interpret advice to avoid albacore tuna as advice to avoid all tuna.  Industry lobbyists urged the FDA to keep albacore tuna off the methylmercury advisory.   Somehow, albacore tuna got left off.

That was in 2006.   Consumer Reports tells us that pretty much all tuna is too high in methylmercury to be consumed by pregnant women.  So this comment still seems relevant, no?

Evidence: Here’s the response from the National Fisheries Institute:  “Consumer Reports has long history of intentionally mischaracterizing tuna.”

When the FDA advisory came out a week or so ago, I started getting questions about whether it meant that women must eat fish during pregnancy and, if so, how much.

As I said in my previous post on the topic, if you like fish, of course eat it, otherwise I can’t think of any compelling reason why anyone has to eat fish.

I view the data on the dilemma caused by omega-3 fatty acids in fish (good) versus the content of methylmercury (bad) as still rather uncertain.  Dr. Malden Nesheim and I discussed this point in an editorial we wrote for the American Journal of Clinical Nutrition [reference 1 below].

Here’s what the FDA advisory says:

Eat 8 to 12 ounces of a variety of fish each week from choices that are lower in mercury. The nutritional value of fish is important during growth and development before birth, in early infancy for breastfed infants, and in childhood… Fish contains important nutrients for developing fetuses, infants who are breastfed, and young children. Fish provides health benefits for the general public. Many people do not currently eat the recommended amount of fish.

This is a prescriptive statement telling pregnant women that they should eat fish.

I would argue that the data on which FDA based this prescription are limited, especially because the results of its scientific assessment are based mostly on theoretical models rather than empirical studies.

Here’s what makes me think some skepticism is warranted:

1. The effects of even low-level methylmercury exposure may be greater than discussed in the assessment [see reference 2], as the latest analysis from the Environmental Working Group explains.
2. The increase in young children’s IQ associated with fish-eating during pregnancy is low—-0.7 to a maximum of 3 IQ points.

As the FDA’s assessment report says:

On a population basis, average neurodevelopment in this country is estimated to benefit by nearly 0.7 of an IQ point (95% C.I. of 0.39 – 1.37 IQ points) from maternal consumption of commercial fish. For comparison purposes, the average population-level benefit for early age verbal development is equivalent in size to 1.02 of an IQ point (95% C.I. of 0.44 – 2.01 IQ size equivalence). For a sensitive endpoint as estimated by tests of later age verbal development, the average population-level benefit from fish consumption is estimated to be 1.41 verbal IQ points (0.91, 2.00). The assessment also estimates that a mean maximum improvement of about three IQ points is possible from fish consumption, depending on the types and amounts of fish consumed.

How significant is this?  And does the small benefit in childhood persist into adolescence or adulthood?

3. The economic question.  Fish are expensive.
4. The ecological questions.  Advice to increase fish consumption comes up against environmental realities—-overfishing, fish farming—-that make the recommendation impossibly unsustainable [reference 3].

• The levels of long-chain omega-3s in farmed fish depend on feeding them wild fish, an ecological problem on its own.
• Guidance about fish can’t be just nutritional; it has to take the economic and ecological impact of fish choices into consideration [reference 4].
• Current per capita fish consumption is about half the FDA recommended level, and half of that is shrimp.  Fortunately, shrimp don’t have much mercury (although the ones from Asia may have other contaminants), but they also don’t have much omega-3).

All of this suggests grounds for skepticism.  I think a better recommendation would leave more wiggle room to account for uncertainties.  Here’s how I would edit the FDA’s statement:

Pregnant women may eat up to 8 to 12 ounces of a variety of fish each week from choices that are lower in mercury.  Fish are useful sources of nutrients that may have value for growth and development before birth, in early infancy for breastfed infants, and in childhood, and may provide health benefits for the general public.  Other food sources also provide such benefits.

References

[1] Nesheim MC, Nestle M. Advice for fish consumption: challenging dilemmas. American Journal of Clinical Nutrition. 2014;99:973-974.

[2] Karagas MR, Choi AL, Oken E, Horvat M, Schoeny R, Kamai E, Cowell W, Grandjean P, Korrick S. Evidence on the human health effects of low-level methymercury  exposure. Environ Health Perspect. 2012; 120:799-806.

[3] Jenkins D, Sievenpiper JL, Pauli D, Sumaila UR, Kendall CWC  Are dietary recommendations for use of fish oils sustainable? Canadian Medical Association Journal 2009;180: 633-637.

[4] Oken E, Choi AL Karagas MR, Marien K, Rheinberger CM, Schoeny R, Sunderland E, Korrick S  Which fish should I eat? Perspectives influencing fish consumption choices. Environmental Health Perspectives 2012;120:790-798.

Eating fish presents difficult dilemmas (I evaluate them in five chapters of What to Eat).

This one is about asking pregnant women to weigh the benefits of fish-eating against the hazards of their toxic chemical contaminants to the developing fetus.

The Dietary Guidelines tell pregnant women to eat 2-to-3 servings of low-mercury fish per week (actually, it’s methylmercury that is of concern, but the FDA calls it mercury and I will too).

But to do that, pregnant women have to:

• Know which fish are low in mercury
• Recognize these fish at the supermarket, even if they are mislabeled (which they sometimes are).

Only a few fish, all large predators, are high in mercury.  The FDA advisory says these are:

• Shark
• Swordfish
• King Mackerel
• Tilefish

What?  This list leaves off the fifth large predator: Albacore (white) tuna.  This tuna has about half the mercury as the other four, but still much more than other kinds of fish.

The figure below comes from the Institute of Medicine’s fish report.  It shows that fish highest in omega-3 fatty acids, the ones that are supposed to promote neurological development in the fetus and cognitive development in infants, are also highest in mercury.

White tuna is the line toward the bottom.  The ones in the blue boxes are all much lower in omega-3s and in mercury except for farmed Atlantic salmon (high in omega-3s, very low in mercury).

What’s going on here?

• Tuna producers know you can’t tell the difference between white and other kinds of tuna and don’t want you to stop eating tuna during pregnancy.
• The data on the importance of eating fish to children’s cognitive development are questionable (in my opinion).  The studies are short term and it’s difficult to know whether the small gains in early cognitive development that have been reported make any difference a few months later.
• The FDA must be under intense pressure to promote fish consumption.

I think it is absurd to require pregnant women to know which fish to avoid.  In supermarkets, fish can look pretty much alike and you cannot count on fish sellers to know the differences.

Other dilemmas:

• Even smaller fish have PCBs, another toxin best avoided by pregnant women, if not everyone.
• The world’s seafood supply is falling rapidly as a result of overfishing.
• Half of the mercury in seafood derives from emissions from coal-burning power plants.  The best way to reduce mercury in fish is to clean up the emissions from those plants, but plant owners want to avoid the expense.

That’s fish politics, for you.

The FDA documents:

• Press Release: FDA and EPA Issue Draft Updated Advice for Fish Consumption
• FDA and EPA Draft Updated Advice for Fish Consumption (open for public comment)
• Federal Register Notice – Environmental Protection Agency and Food and Drug Administration Advice About Eating Fish: Availability of Draft Update
• Consumer Update: New Advice: Some Women and Children Should Eat More Fish
• Dietary Guidelines for American’s 2010
• Quantitative Assessment of the Net Effects on Fetal Neurodevelopment from Eating Commercial Fish

Mal Nesheim and I have an editorial in a recent issue of the American Journal of Clinical Nutrition: “Advice for fish consumption: challenging dilemmas.”

We commented on a research article evaluating blood mercury levels in adults eating seafood.

In it, we point out that

the 2010 Dietary Guidelines for Americans advise Americans to consume 8 ounces (227 g) of seafood per week to reach an average intake of 250 mg/d of the omega-3 fatty acids EPA and DHA.

This recommendation represents a substantial increase over current consumption amounts of ∼3.5 oz/wk. It is based on “moderate, consistent evidence” that the health benefits of increased seafood consumption outweigh the risks associated with methylmercury, a toxic contaminant of large predatory food fish (tilefish, shark, swordfish, king mackerel) and, to a lesser extent, albacore (white) tuna.

To avoid this toxin, the guidelines advise eating seafood typically found to be low in methylmercury, such as salmon, anchovies, sardines, and trout.

Such advice, however, leads to at least 3 dilemmas. Eating more fish might raise methylmercury intake above safe amounts. Pressures to consume more fish might place impossible demands on an already threatened seafood supply. And the obvious solution—fish farming—raises concerns about what farmed fish are fed and how farmed fish affects the environment.

We urge the 2015 Dietary Guidelines committee to take all this into consideration when making recommendations about fish consumption: “We hope that its advice for seafood consumption will help a confused public resolve some of these dilemmas and make wise seafood choices.”

Wise seafood choices may be an oxymoron, alas.

My post yesterday about the politics of catfish inspection inspired comments that I need to better appreciate the superiority of USDA’s import safety program, which requires this checklist for steps that must be taken by importers of meat, poultry, or processed egg products:

As I am endlessly complaining, the farm bill is so detailed, complicated, and opaque that no rational person can possibly understand it, let alone a member of Congress.

To wit: catfish inspection.

As Gail Collins noted in her New York Times column a week or so ago, some members of the House want the USDA to inspect catfish, not the FDA (which ordinarily is responsible for fish inspection).  The current FDA inspection office costs $700,000 per year.  The USDA office, established by the 2008 farm bill, costs about $14 million a year, even though the USDA has not gotten around to issuing rules or actually inspecting catfish.

What is this about?  Not fish safety, really.  It’s about protecting catfish farmers in the South and setting up “more rigorous” safety criteria that will exclude competitive foreign catfish imports, especially from Vietnam.

The House version of the farm bill calls for repeal of USDA catfish inspection as a cost-cutting measure (the Senate farm bill does not mention catfish inspection, which means it leaves the USDA office in place).

Thad Cochran, Republican Senator from Mississippi, wants the House to delete the repeal provision, keep USDA in charge, and, thereby, protect the Mississippi catfish industry from foreign catfish imports.

Politico Pro quotes a member of Cochran’s staff:

Sen. Cochran has made it clear that his priority is to complete the new farm bill and get it signed into law. It sounds like there are some who have a deep under-appreciation of the diversity of Mississippi’s agriculture industry and the importance of this bill to the state’s farmers, foresters, hunters, and those in need of nutrition assistance.

The New York Times also points out that although some watchdog consumer groups support tougher safety standards for catfish (because of lower foreign standards for antibiotics and other chemicals), a Government Accountability Office report in May 2012 called imported catfish a low-risk food and said an inspection program at the Agriculture Department would “not enhance the safety of catfish.”

Now, says the Times in another article, a coalition of budget watchdog groups and a seafood trade group are lobbying to repeal the USDA’s inspection program.

All of this is in the House version of the farm bill, but unless you are a lobbyist for the catfish industry, you would never know it from the bill itself.  Here’s the relevant section from the  House bill.

As Gail Collins puts it,

See, this is what I like about the farm bill. The agriculture parts harken back to the golden era when Republicans and Democrats could work together to promote stupid ideas that benefited the special interests in their districts. And then go out and get inebriated in bipartisan drinking sessions. Now everybody is in the gym and then shutting down the government.

A coalition of consumer, health, food safety and fishing groups behind the “Campaign for Genetically Engineered (GE)-Free Seafood” is recruiting grocery store chains to agree not to sell genetically engineered seafood even if the FDA allows it to be sold.  The campaign is aimed at the genetically modified AquaBounty salmon, which the FDA has had under consideration for ages, with no decision in sight.

The stores that have pledged not to sell GM salmon include Trader Joe’s (367 stores), Aldi (1,230 stores), Whole Foods (346 stores in U.S.), Marsh Supermarkets (93 stores in Indiana and Ohio), and PCC Natural Markets (9 stores in Washington State) and co-ops in Minnesota, New York, California, and Kansas.

This is a big deal because other GM seafood are in the research pipeline.  Large percentages of Americans say they oppose GM seafood and that the FDA should not allow it to be marketed.

And if the FDA does approve it, the agency is highly unlikely to require any special kind of labeling.

This reminds me of what happened to genetically modified tomato paste in the U.K.  Supermarket chains were selling the cans with labels clearly indicating that they were “produced from genetically modified tomatoes.”  The stores priced them favorably, and customers bought them — until Monsanto shipped unlabeled corn to Great Britain and caused a furor.

Retailers decided that they had plenty of tomato paste, didn’t need upset customers, and refused to continue selling the GM varieties.

Retailers call the shots in this situation.

I think much of the public distress over GM foods is because of lack of transparency.  Without labels, customers cannot exercise freedom of choice.

Just label it!