In beginning suspension actions today against companies which have not performed health effect
studies, we will ensure that we have all information necessary to protect the public health.
An overarching question is whether eye blink rates provide an early warning of a health effect
Before you can set a standard or water quality perimeter, you have to have the health effect
, technology and the cost.
Some results suggest a possible health effect
, while others don't.
Even though scientists continue to debate whether an excess of this P450 enzyme causes any adverse health effects
, "few people will contend that suppression of the immune system is not an adverse health effect
," she observers.
To assess the differential effects of PM on specific populations, epidemiologic studies often conduct stratified analyses; a stronger association between PM and the health effect
being measured in one subgroup compared with another provides evidence for a more susceptible population.
This finding points to a subtle but potentially important adverse health effect
of long-term low-level exposure to these chemicals.
It was OK, EPA said, because it considered that condition to be only a cosmetic effect, not ma adverse health effect
, We found that the reason for EPA's position was that it was under political pressure to set its health-based standard for fluoride at 4 mg/liter (2).
In the late 1970s and early 1980s, decisions made by Pennsylvania, Illinois and Texas lower courts, after extensive expert witness testimony, concluded that, at 1 part per million in the water supply, fluoride aggravated existing illnesses, caused adverse health effects
, and, for two rulings, resulted in a higher incidence of cancer deaths; however, while leaving the health effect
findings intact, appellate courts ruled that the beyond-a-reasonable-doubt standard used by the lower courts in the case of representative body decisions should be elevated to "no controversy," meaning that if an elected body had only one expert witness that supported their decision, that was sufficient to preserve their decision against all other evidence.
Battle lines being drawn over the proposal are based primarily on the issue of whether fluorosis constitutes an adverse health effect
Now NIEHS grantee Howard Hu and colleagues at Harvard University have uncovered what could be another adverse health effect
with global implications: cataracts.
Additional assaults to communities near OSB clear cuts include adverse health effects
from applications of toxic herbicides and fertilizers used in replacement plantations.