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High Mercury Levels Are Found in Tuna Sushi

Sushi

Sushi from 5 of the 20 places had mercury levels so high that the Food and Drug Administration could take legal action to remove the fish from the market. The sushi was bought by The New York Times in October.

“No one should eat a meal of tuna with mercury levels like those found in the restaurant samples more than about once every three weeks," said Dr. Michael Gochfeld, professor of environmental and occupational medicine at the Robert Wood Johnson Medical School in Piscataway, N.J.

Dr. Gochfeld analyzed the sushi for The Times with Dr. Joanna Burger, professor of life sciences at Rutgers University. He is a former chairman of the New Jersey Mercury Task Force and also treats patients with mercury poisoning.

The owner of a restaurant whose tuna sushi had particularly high mercury concentrations said he was shocked by the findings. “I’m startled by this,” said the owner, Drew Nieporent, a managing partner of Nobu Next Door. “Anything that might endanger any customer of ours, we’d be inclined to take off the menu immediately and get to the bottom of it.”

Although the samples were gathered in New York City, experts believe similar results would be observed elsewhere.

“Mercury levels in bluefin are likely to be very high regardless of location,” said Tim Fitzgerald, a marine scientist for Environmental Defense, an advocacy group that works to protect the environment and improve human health.

Most of the restaurants in the survey said the tuna The Times had sampled was bluefin.

In 2004 the Food and Drug Administration joined with the Environmental Protection Agency to warn women who might become pregnant and children to limit their consumption of certain varieties of canned tuna because the mercury it contained might damage the developing nervous system. Fresh tuna was not included in the advisory. Most of the tuna sushi in the Times samples contained far more mercury than is typically found in canned tuna.

Over the past several years, studies have suggested that mercury may also cause health problems for adults, including an increased risk of cardiovascular disease and neurological symptoms.

Dr. P. Michael Bolger, a toxicologist who is head of the chemical hazard assessment team at the Food and Drug Administration, did not comment on the findings in the Times sample but said the agency was reviewing its seafood mercury warnings. Because it has been four years since the advisory was issued, Dr. Bolger said, “we have had a study under way to take a fresh look at it.”

No government agency regularly tests seafood for mercury.

Tuna samples from the Manhattan restaurants Nobu Next Door, Sushi Seki, Sushi of Gari and Blue Ribbon Sushi and the food store Gourmet Garage all had mercury above one part per million, the “action level” at which the F.D.A. can take food off the market. (The F.D.A. has rarely, if ever, taken any tuna off the market.) The highest mercury concentration, 1.4 parts per million, was found in tuna from Blue Ribbon Sushi. The lowest, 0.10, was bought at Fairway.

When told of the newspaper’s findings, Andy Arons, an owner of Gourmet Garage, said: “We’ll look for lower-level-mercury fish. Maybe we won’t sell tuna sushi for a while, until we get to the bottom of this.” Mr. Arons said his stores stocked yellowfin, albacore and bluefin tuna, depending on the available quality and the price.

At Blue Ribbon Sushi, Eric Bromberg, an owner, said he was aware that bluefin tuna had higher mercury concentrations. For that reason, Mr. Bromberg said, the restaurant typically told parents with small children not to let them eat “more than one or two pieces.”

Koji Oneda, a spokesman for Sushi Seki, said the restaurant would talk to its fish supplier about the issue. A manager at Sushi of Gari, Tomi Tomono, said it warned pregnant women and regular customers who “love to eat tuna” about mercury levels. Mr. Tomono also said the restaurant would put warning labels on the menu “very soon.”

Scientists who performed the analysis for The Times ran the tests several times to be sure there was no mistake in the levels of methylmercury, the form of mercury found in fish tied to health problems.

The work was done at the Environmental and Occupational Health Sciences Institute, in Piscataway, a partnership between Rutgers and the Robert Wood Johnson Medical School.

 

 

 
 

 
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