Read these two factual statements about the
information contained in the article.
Which claim can be made using both facts?
Research to determine whether fluoride can
cause cancer in humans has not been
performed.
Fact 1: Researchers found more cases of
osteosarcoma (one type of bone cancer) than
expected. They considered this as uncertain
evidence that fluoridated drinking water had the
potential to cause cancer in male rats. They did
not find similar potential to cause cancer in female
rats or in male or female mice.
It is possible that there is a link between
gender and fluoride's ability to cause certain
types of cancer
Fluoride in the drinking water is safe at any
level for humans, but not so for small animals
like mice and rats.
DONE
Fact 2: In 2006, the Harvard study found that in
boys, but not in girls, a higher risk of osteosarcoma
was linked to exposure to higher levels of fluoride
in drinking water.
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