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High levels of four types of PFAS showed effects on sleep in young adults. The scientists who conducted this study are the first to delve into underlying molecular mechanisms, identifying genes involved with the body’s natural defenses and a hormone that regulates sleep.

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In the first study to look at the effects of phenol exposure on human heart activity, scientists concluded that higher exposure to a type of phenol, bisphenol A (BPA) and its derivatives, in women is associated with altered cardiac electrical activity. Anything affecting the heart’s electrical properties can be detrimental and possibly result in arrhythmias. Environmental phenols are found in many common consumer items, such as preservatives in packaged foods, personal care products, and plastic dishware.

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Girls exposed to certain endocrine-disrupting chemicals may start puberty early, according to research published in Endocrinology, a journal of the Endocrine Society. These chemicals mimic, block, or interfere with hormones in the body’s endocrine system. One example is musk ambrette, which is a synthetic ingredient used to scent some detergents, perfumes, and personal care products, and a group of medications called cholinergic agonists.

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Increased rates of stillborn births were seen among people who lived near (within .31 miles or 500 meters) areas where pesticides were used during their first trimester of pregnancy or pre-conception, according to new research.

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