Buyer beware: Plenty of our toiletries may contain hidden, potentially dangerous ingredients, new research suggests. Scientists with the Million Marker Research Institute examined over a hundred personal care and cleaning products. Nearly all appeared to contain at least one chemical not disclosed in the product’s labeling, while many had possibly hazardous chemicals that were unlabeled, even those marketed as “non-toxic.” The researchers argue that more extensive regulation and added testing of these products are sorely needed. “These findings reveal substantial gaps in product transparency and demonstrate that ingredient labels alone cannot reliably convey product safety,” they wrote in their paper, published Tuesday in the journal Environment & Health. Hidden dangers The Million Marker Research Institute is a nonprofit organization focused on conducting “non-targeted product testing and analysis of everyday items to uncover hidden chemical contaminants.” It’s the research arm of Million Marker, a company that sells consumer tests intended to detect levels of endocrine-disrupting chemicals (EDCs) in people’s blood. EDCs mimic or otherwise interfere with the hormones we naturally produce, like testosterone and estrogen, and may raise the risk of various health problems.