Zbadano 15 roznych marek pokarmu dla niemowlat.
Skladnik paliwa rakietowego (perchlorate) znaleziono w kazdej z badanych marek.
Oczywiscie wszystko w ramach dopuszczalnych norm.
Skladnik ten jest badany bo moze ingerowac w produkcje hormunu thyroidu.
Skladnik ten byl znaleziony w w wodociagach 25 stanow USA..
W tych obszarach istnieje mozliwosc kumulacji skladnika w pozywieniu - woda + pokarm.
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Rocket Fuel Chemical Found in Baby Formula
Source: ABC News
When a parent puts a bottle of baby formula to a child's lips, the parent might not know exactly what ingredients are in that thick, nutritionally packed mix. But rocket fuel? That's not an ingredient many expect to find.
A study by government researchers released Thursday tested 15 different brands of formula and found a chemical -- also found in rocket fuel -- contaminating every single one.
While the levels of the chemical, perchlorate, have been deemed safe by the Environmental Protection Agency, some worry public health is at risk.
Scientists at the Centers for Disease Control and Prevention tested the formula for the presence of perchlorate, a chemical used as the main ingredient in solid rocket fuel. It's a worry because perchlorate can interfere with the production of thyroid hormones by inhibiting the absorption of iodine.
The CDC study found cow's milk-based formula contained more perchlorate than that made with soy or other ingredients.
The two brands with the highest levels -- more than double that of the other milk-based products -- command 87 percent of the market share for infant formula.
The report does not specify the brand names of any formula tested.
Perchlorate has been found in the water supplies of 35 states and has been detected in everything from vegetables to milk. In the case of dairy, the rocket fuel in the water flows into grass, which is eaten by cows, and is then passed along into milk.
The perchlorate was found in levels within a range that's been deemed safe by the Environmental Protection Agency.
CDC researchers write that "this is reasssuring at first glance," but add that it could be problematic because drinking water in 26 states has high perchlorate levels. So, mixing contaminated powdered milk with contaminated water in those places could result in a dangerous exposure.
"The widespread penetrance of these products, and the potential for utilization of water for reconstitution that has even minimal concentrations of perchlorate," the researchers write, "suggest that a significant number of infants consuming bovine milk-based [powdered infant formula] with lactose, will have perchlorate doses in excess of the [recommended limit]."
Advocacy Groups Says Risk Is Understated
The Environmental Working Group, an organization that advocates for stricter limits on a variety of chemicals, contends EPA's recommended limit is set "too high to protect public health" and understates the risk.
"Perchlorate contamination of drinking water is a very serious concern, particularly for infants," said Dr. Anila Jacob, an Environmental Working Group scientist.
Dr. Sheela Sathyanarayana, a pediatrician who works on environmental health issues at Seattle Children's Hospital and at the University of Washington department of pediatrics, said it's difficult to say whether this sort of exposure is dangerous.
"Considered in isolation, these perchlorate concentrations in formula are not concerning for child health," Sathyanarayana wrote in an e-mail to ABC News. "The reason that some may be concerned about health effects to children is that there are several sources of perchlorate in our environment ... and, therefore, the cumulative dose of perchlorate to an infant may be much higher than that found in the formula."
"That being said," she added, "the most well-respected studies (only a handful exist) on perchlorate contamination have not found any link between perchlorate contamination in water and health impacts in children. Therefore, we truly do not know if this kind of contamination may be leading to health problems or not."
Another professor of pediatrics, Keith-Thomas Ayoob of the Albert Einstein College of Medicine, considers the findings "disturbing" and "a wake-up call to municipalities to clean up their water supplies, if at all possible."
At her confirmation hearing in January, EPA Administrator Lisa Jackson agreed to take another look at the safety of perchlorate.
The study appeared in the March 2009 issue of the Journal of Exposure Science and Environmental Epidemiology.
The CDC study is based on a handful of samples bought in one city and includes the caveat: "The results of this study may not be relevant throughout the United States."
Still, Ayoob told ABC News, "This is a perfect example of how polluting one area of the environment can be magnified."
"It's not causing harm to the animals or most consumers, but you can see how the effect can be magnified," Ayoob said. "If we get rid of the perchlorate, then the infants, their parents, all consumers, and even the cows and the farmers will be better off and happier."
Read the Environmental Working Group's analysis of the CDC study
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