Being exposed to musk ambrette through products — for example, by inhaling it — may cause the brain to release puberty-related hormones, the study, published in the journal Endocrinology, found. It's the first research to focus on how environmental chemicals may lead to early puberty, Dr. Natalie Shaw, a pediatric endocrinologist at the National Institute of Environmental Health Sciences and co-senior author of the study, told NBC News.
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