Since the 1960s, bisphenol A has been used to make hard plastic bottles, suction cups for infants, food and beverage cans on the inside, including cans used to hold infant formula and soft drinks. Until recently, it was still used in baby bottles. But now big manufacturers are producing bottles that do not contain bisphenol A. Plastic products containing bisphenol A are usually marked with a "7" at the bottom to facilitate recycling.
This chemical can penetrate into food. A study of more than 2,000 people found that more than 90% of the more than 2,000 people had bisphenol A in their urine. Bisphenol A traces are also found in breast milk, pregnant women's blood and umbilical cord blood.
According to the "New York Times" reported on the 17th, the US Food and Drug Administration (hereinafter referred to as the FDA) recently said that it is closely monitoring the possible health risks of bisphenol A (BPA). Bisphenol A is a widely used ingredient in plastic bottles and food bottle packaging. The FDA announced in 2008 that it is safe for humans, but the relevant agencies are now assessing the possible health risks.At a press conference last Friday, the agency said: "There is some concern about the potential effects of BPA on the brain, behavior and prostate of the fetus, infants and children," and stated that it will cooperate with other federal health agencies. The effect of bisphenol A on animals and humans was studied.
Some studies have found that bisphenol A has a detrimental effect on animals; in addition, it is recognized that this chemical has penetrated into food and infant milk powder, and almost everyone has access to it from the fetus. Therefore, bisphenol A is getting more and more attention.
But US health officials also believe that there is no evidence that BPA is harmful to humans.
Dr. Joshua Sharfstein, deputy director of the US FDA, said at the press conference: "If we think it is unsafe, we will strengthen its supervision."
In spite of this, the FDA suggests that people can take the following measures to reduce BPA exposure: for example, throw away scratched or worn bottles or cups containing bisphenol A (bisphenol A can leak out of the scratches) Do not pour in very hot liquids at the same time, and check the trademarks on them to make sure they are safe to heat on the microwave oven. The FDA also recommends that babies breastfeed for more than 12 months, because liquid formula contains BPA.
The report on the potential adverse effects of BPA on human health has made it notorious, and it has caused particular concern for parents of infants and young children. Manufacturers are now avoiding making people think that their products contain such chemicals. The use of bisphenol A in children's products has been banned in Chicago and Suffolk County, New York.
At this press conference, U.S. health officials announced that the U.S. government will invest 30 million U.S. dollars in funding animal and human trials and conduct research on the effects of bisphenol A in the next 18 months to two years.
Dr. Linda Birnbaum, director of the U.S. National Institute of Environmental Health Sciences, said that the study will involve bisphenol A on human behavior, obesity, diabetes, reproductive system disorders, cancer, asthma, and heart disease. Other potential impacts. These effects can be inherited from generation to generation.
In the United States, the bisphenol A problem has caused fierce debates, but both parties who support and oppose bisphenol A harm to the human body have expressed disappointment with the government's actions. The American Chemistry Council, which represents the company that manufactures and uses bisphenol A, issued a statement saying that BPA is safe and praised the health department for finding that there is no evidence that it is harmful to the human body, but also said: “We feel Disappointed, the recommendations made by the health department may cause consumers to worry, and these suggestions are not very reasonable."
Diana Zuckerman, president of the National Women’s and Family Research Center of the United States, believes that the FDA is still far from enough, because its recommendations allow families to assume responsibility for the prevention of bisphenol A, which should have been a company producing bisphenol A. Responsibility. In addition, Ms. Zuckerman believes that attention to the safety of BPA should not be limited to children. Some studies have shown that this chemical is linked to adult heart disease, liver disease and other diseases.
The U.S. government’s evaluation of bisphenol A has been controversial. The FDA wrote a draft report in 2008 that claimed it was safe. But shortly after, the National Toxicology Program (NTP) under the National Institutes of Health (NIH) thought that bisphenol A caused "some concerns" and proposed that bisphenol A "to the fetus. "There is a potential impact on the brain, behavior and prostate of infants and children." Now, the FDA also agrees with this view.
Subsequently, the FDA requested an independent panel of scientific advisors to review its draft report. After rigorous review, the group criticized the FDA for ignoring some of the important evidence and gave the consumer an illusion of the safety of this chemical. The FDA promised to reconsider the safety of bisphenol A, which was reflected in its statement on Friday.
Dr. Schaffstein said in an interview: “We are talking about the safety of this substance for the first time. On this issue, the disagreement between us and the NIH has narrowed.â€
Dr. Schaffstein acknowledged that the FDA has begun adopting new experimental techniques to study the safety of bisphenol A. Previous experimental methods have given experimental animals large doses of bisphenol A and then sought explicit evidence of their effects in producing diseases such as disease, tumors, or organ damage. The current experimental method uses a small dose of bisphenol A, which is similar to the dose of human exposure, and finds more subtle effects, such as behavioral or biochemical changes. The results of such experiments may be harder to master and require more research.
Dr. Schaffstein said that the FDA is also reassessing its supervision of BPA. Now that the substance is classified as a food additive, it is cumbersome and time-consuming to change the way in which such substances are supervised. Dr. Schaffstein said that he hopes to list bisphenol A as a "food contact substance," which will give the FDA greater supervisory power and allow the FDA to act more quickly if necessary.
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