Post by crazylikeafox on Mar 1, 2005 9:13:31 GMT
« Thread started on: Feb 27th, 2005, 02:09am »<br>
Sorry had posted this in wrong area
A toxic component of rocket fuel has been found in breast milk of women in 18 states and store-bought milk from various locations around the United States.
The chemical, perchlorate, can impede adult metabolism and cause retardation in fetuses, among other things. It leaches into groundwater from various military facilities.
Previous studies have found perchlorate in drinking water, on lettuce, and in cows milk.
The new research, announced this week, suggests perchlorate is a bigger problem than thought, scientists said.
Texas Tech University researchers studied 36 samples of breast milk from women in 18 states and 47 samples cow's milk purchased from stores in 11 states. Every sample of breast milk contained perchlorate, as did all but one sample of dairy milk.
The highest levels were found in women from New Jersey, New Mexico, Missouri, Nebraska and California, in that order.
The results are detailed in the online version of Environmental Science & Technology, a journal of the American Chemical Society. The work was led by Texas Tech biochemist Purnendu Dasgupta.
"We've got to come to grips with the perchlorate situation quickly,'' said California Senator Dianne Feinstein in a statement. "And EPA has to move quickly to set a national drinking water standard that protects the health and safety of all Americans.''
The details
Perchlorate occurs naturally and is also a primary ingredient in solid rocket fuel, munitions and fireworks. Perchlorate does not build up in human tissues over time, scientists say, but there has been speculation it could accumulate in breast milk.
In excess, the chemical can interfere with iodide uptake in the thyroid gland, disrupting adult metabolism and childhood development, scientists say.
In fetuses, it can potentially cause mental retardation, loss of hearing and speech, and motor skill deficits.
The average perchlorate concentration in breast milk samples was 10.5 micrograms per liter. The dairy milk average was 2.0 micrograms per liter. No definitive national standard exists, although the U.S. Environmental Protection Agency had suggested a limit of 1.0 micrograms per liter in drinking water.
The study also found that high levels of perchlorate in the breast milk samples were indeed related to low levels of iodide. Low iodide levels can inhibit thyroid function in nursing women. Scientists admit there is limited data, but Dasgupta and colleagues said the levels found in the study are "sufficiently low to be of concern."
They suggest that the recommended daily intake of iodine for pregnant and nursing women may need to be revised upward.
The report should not raise undue alarm, said Ed Urbansky, a former Environmental Protection Agency chemist who was not involved in the latest study.
"It's very difficult to determine what the findings might be other than to know it might be in so many milk samples,'' Urbansky said.
Scarey thought
Fox
Sorry had posted this in wrong area
A toxic component of rocket fuel has been found in breast milk of women in 18 states and store-bought milk from various locations around the United States.
The chemical, perchlorate, can impede adult metabolism and cause retardation in fetuses, among other things. It leaches into groundwater from various military facilities.
Previous studies have found perchlorate in drinking water, on lettuce, and in cows milk.
The new research, announced this week, suggests perchlorate is a bigger problem than thought, scientists said.
Texas Tech University researchers studied 36 samples of breast milk from women in 18 states and 47 samples cow's milk purchased from stores in 11 states. Every sample of breast milk contained perchlorate, as did all but one sample of dairy milk.
The highest levels were found in women from New Jersey, New Mexico, Missouri, Nebraska and California, in that order.
The results are detailed in the online version of Environmental Science & Technology, a journal of the American Chemical Society. The work was led by Texas Tech biochemist Purnendu Dasgupta.
"We've got to come to grips with the perchlorate situation quickly,'' said California Senator Dianne Feinstein in a statement. "And EPA has to move quickly to set a national drinking water standard that protects the health and safety of all Americans.''
The details
Perchlorate occurs naturally and is also a primary ingredient in solid rocket fuel, munitions and fireworks. Perchlorate does not build up in human tissues over time, scientists say, but there has been speculation it could accumulate in breast milk.
In excess, the chemical can interfere with iodide uptake in the thyroid gland, disrupting adult metabolism and childhood development, scientists say.
In fetuses, it can potentially cause mental retardation, loss of hearing and speech, and motor skill deficits.
The average perchlorate concentration in breast milk samples was 10.5 micrograms per liter. The dairy milk average was 2.0 micrograms per liter. No definitive national standard exists, although the U.S. Environmental Protection Agency had suggested a limit of 1.0 micrograms per liter in drinking water.
The study also found that high levels of perchlorate in the breast milk samples were indeed related to low levels of iodide. Low iodide levels can inhibit thyroid function in nursing women. Scientists admit there is limited data, but Dasgupta and colleagues said the levels found in the study are "sufficiently low to be of concern."
They suggest that the recommended daily intake of iodine for pregnant and nursing women may need to be revised upward.
The report should not raise undue alarm, said Ed Urbansky, a former Environmental Protection Agency chemist who was not involved in the latest study.
"It's very difficult to determine what the findings might be other than to know it might be in so many milk samples,'' Urbansky said.
Scarey thought
Fox