New research has identified at least 485 chemicals used in US pesticide products that are linked to breast cancer, raising questions about the safety of food and other products at a time when early onset breast cancer rates are surging worldwide. The new peer-reviewed paper, published in Environmental Health Perspectives ... highlights what public health advocates say are a range of deficiencies in how US pesticides are regulated. The review includes active pesticide ingredients, but also hundreds of so-called “inert”, or inactive, ingredients that typically do not undergo a thorough safety review. The Environmental Protection Agency only considers each pesticide ingredient’s individual health risks, and does not consider the entire pesticide formula, or exposure to multiple pesticides. The chemicals are not just found in pesticides used on crops, but also in lice treatments applied to children’s scalps, home lawn fertilizers, and flea and tick treatments. About 4,000 inert ingredients are approved for use by the EPA, among them Pfas “forever chemicals”. They are often added to make the pesticide more toxic to a living organism. Another problem lies in hormone-disrupting chemicals causing disease at lower levels of exposure, but not higher. This “non-monotonic dose response” has led the EPA to dismiss some chemicals’ risks, and ignore that they can cause cancer at low levels.