[Pharmwaste] A bad mix: exposure may be "safe" only with
onechemical at a time
randsney at comcast.net
randsney at comcast.net
Mon Sep 14 16:48:26 EDT 2009
By Dr. Ronald E. Ney, Jr., Ph.D.
Many will say exposure to chemicals and their degradation products, and/or
biologicals in consumer products, in the environment, etc. is so small there
is little chance of risk. While this may be true in many cases, safety
cannot be judged on one chemical or one biological alone. Humans and other
animals are a mixture of chemicals and their degradation products, and
biologicals, and we take in hundreds of different chemicals and biologicals
a year. How safe are these chemicals and their degradation products,
(pesticides, hormones, metals, etc.) and biologicals when the aggregate,
synergistic, antagonistic, co-metabolism and co-biometabolism effects are
never mentioned or studied to any extent, if at all and, they are not used
in risk assessments? In other words, the total picture is never known or
considered for hazards to adults, child endangerment and environmental
safety when it should be required.
----- Original Message -----
From: "Tenace, Laurie" <Laurie.Tenace at dep.state.fl.us>
To: <pharmwaste at lists.dep.state.fl.us>
Sent: Tuesday, September 01, 2009 11:16 AM
Subject: [Pharmwaste] A bad mix: exposure may be "safe" only with
onechemical at a time
http://www.environmentalhealthnews.org/ehs/newscience/bad-mix-exposures-safe-
only-one-chemical-at-a-time/ - more at the web site.
A bad mix: exposure may be "safe" only with one chemical at a time.
Sep 01, 2009
Exposure to a mixture of pollutants found in food, water and air have more
severe effects than each chemical alone.
Exposure to a mixture of environmental chemicals is far more harmful to male
rats than exposure to the individual chemicals would predict, even when the
level of each contaminant in the mixture causes no effect by itself. The
results indicate that assessing the risk of chemicals one-compound-at-a-time
will underestimate potential harm. People are exposed to hundreds of
chemicals at a time, if not more. People could be affected by mixtures of
chemicals that are currently considered "safe" based on their individual
toxicities.
Laurie Tenace
Environmental Specialist
Waste Reduction Section
Florida Department of Environmental Protection
2600 Blair Stone Rd., MS 4555
Tallahassee FL 32399-2400
P: 850.245.8759
F: 850.245.8811
Laurie.Tenace at dep.state.fl.us
Mercury: http://www.dep.state.fl.us/waste/categories/mercury/default.htm
Unwanted Medicine:
http://www.dep.state.fl.us/waste/categories/medications/default.htm
The Department of Environmental
Protection values your feedback as a customer. DEP Secretary Michael W. Sole
is committed to continuously assessing and
improving the level and quality of services provided to you. Please take a
few minutes to comment on the quality of
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DEP
survey:
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