Male factory workers in China who got very high doses of a chemical that has been widely used in hard plastic bottles had high rates of sexual problems, researchers reported yesterday.
Heavy exposure to bisphenol A, or BPA, on the job was linked to impotence and lower sexual desire and satisfaction, said the study, which adds to concerns about BPA’s effects on most consumers.
The men in the study experienced BPA levels about 50 times higher than those faced by typical American men, researcher De-Kun Li said.
“We don’t know” whether more typical doses have similar effects, he said.
People shouldn’t be alarmed by the finding, said Li, a reproductive and perinatal epidemiologist at Kaiser Permanente’s research division in Oakland, California. But he said it would be prudent to limit exposure to BPA while scientists look for any effects from lower doses.
The US government recently announced new funding for research into BPA’s effects.
Li is lead author of the latest study, published online yesterday by the journal Human Reproduction. The work was financed by the National Institute of Occupational Safety and Health.
BPA is used in a wide variety of consumer products, including some hard plastic bottles and metal food or beverage cans. Several makers of baby bottles recently said they had stopped using the chemical. Some 90 percent of the US population carries detectable levels in the urine.
Scientists are concerned that BPA exposure might harm the reproductive and nervous systems, and possibly promote prostate and breast cancers. Last year, a preliminary study linked BPA to possible risks for heart disease and diabetes.
The US Food and Drug Administration (FDA) concluded last year that trace amounts of BPA that leach out of bottles and food containers were not dangerous. But it is now reviewing that stance after criticism from its scientific advisers.
For the new research, Li and colleagues studied 164 factory workers in China who were exposed to high levels of BPA on the job.
They were compared with 386 other men in the same town who either worked at other factories or were married to factory workers.
The scientists measured BPA exposure through air sampling and interviewed the workers about their sexual functioning.
Compared with the other workers, men with high BPA exposure were about four times as likely to report trouble achieving erections, about seven times as likely to say they had difficulty ejaculating and about four times as likely to report low sex drive or low satisfaction with their sex lives.
The effects are dramatic and “pretty clearly related to the exposure,” said Linda Birnbaum, director of the National Institute of Environmental Health Sciences, who was not involved in the research.
The finding fits in with animal studies and should be followed up by research in the general population, she said.
Nearly half of China’s major cities are suffering “moderate to severe” levels of subsidence, putting millions of people at risk of flooding, especially as sea levels rise, according to a study of nationwide satellite data released yesterday. The authors of the paper, published by the journal Science, found that 45 percent of China’s urban land was sinking faster than 3mm per year, with 16 percent at more than 10mm per year, driven not only by declining water tables, but also the sheer weight of the built environment. With China’s urban population already in excess of 900 million people, “even a small portion
UNSETTLING IMAGES: The scene took place in front of TV crews covering the Trump trial, with a CNN anchor calling it an ‘emotional and unbelievably disturbing moment’ A man who doused himself in an accelerant and set himself on fire outside the courthouse where former US president Donald Trump is on trial has died, police said yesterday. The New York City Police Department (NYPD) said the man was declared dead by staff at an area hospital. The man was in Collect Pond Park at about 1:30pm on Friday when he took out pamphlets espousing conspiracy theories, tossed them around, then doused himself in an accelerant and set himself on fire, officials and witnesses said. A large number of police officers were nearby when it happened. Some officers and bystanders rushed
Beijing is continuing to commit genocide and crimes against humanity against Uyghurs and other Muslim minorities in its western Xinjiang province, U.S. Secretary of State Antony Blinken said in a report published on Monday, ahead of his planned visit to China this week. The State Department’s annual human rights report, which documents abuses recorded all over the world during the previous calendar year, repeated language from previous years on the treatment of Muslims in Xinjiang, but the publication raises the issue ahead of delicate talks, including on the war in Ukraine and global trade, between the top U.S. diplomat and Chinese
HYPOCRISY? The Chinese Ministry of Foreign Affairs yesterday asked whether Biden was talking about China or the US when he used the word ‘xenophobic’ US President Joe Biden on Wednesday called for a hike in steel tariffs on China, accusing Beijing of cheating as he spoke at a campaign event in Pennsylvania. Biden accused China of xenophobia, too, in a speech to union members in Pittsburgh. “They’re not competing, they’re cheating. They’re cheating and we’ve seen the damage here in America,” Biden said. Chinese steel companies “don’t need to worry about making a profit because the Chinese government is subsidizing them so heavily,” he said. Biden said he had called for the US Trade Representative to triple the tariff rates for Chinese steel and aluminum if Beijing was