Rodent Study Finds Artificial Butter Chemical Harmful to Lungs.
A new study shows that exposure to a chemical called diacetyl,
a component of artificial butter flavoring, can be harmful to the
nose and airways of mice. Scientists at the National Institute
of Environmental Health Sciences (NIEHS), part of the National
Institutes of Health, conducted the study because diacetyl has
been implicated in causing obliterative bronchiolitis (OB) in humans.
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