Feb 25 2010
Study: Chemicals Found in Common Plastics may be “Feminizing” to Boys
Lead researchers from a University of Rochester study presented a disturbing study that found that chemicals in many common household plastics may be altering male hormones in the brains of baby boys. This represents more evidence directly linking chemicals in plastics to harmful effects in humans.
Published recently in the International Journal of Andrology, the report is a clear indication of the dangers of a plastic chemical additive, called phthalates. These additives are commonly added to vinyl flooring, PVC shower curtains and many other every-day products.
The Study
It is a well-known fact that boys have different hormonal compositions than girls. These “male hormones” drive specific types of actions in young boys associated with “rough-and-tumble,” play-fighting behavior.
When these hormonal chemicals are altered, researchers have noted that boys begin to play more like little girls. This may be related to the fact that phthalates cause male hormones to behave more like the female hormone, estrogen, and therefore may reduce the male drive to “play rough.”
Dr. Shanna Swan is a professor of obstetrics, gynecology and environmental medicine, as well as director of the Center for Reproductive Epidemiology at the University of Rochester. She was also the lead scientist looking into phthalate composition in urine samples of pregnant mothers. This study took the incidence of phthalates in mothers, and compared them to behavioral play in their children.
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