Depending on the dose, timing and circumstances of exposure, some chemicals in our environment -- both natural and human-made -- may affect health. File Photo by Jim Ruymen/UPI | License Photo
Imagine an ordinary Tuesday. You wash your hair, put on deodorant, drink coffee, pack lunch in a plastic container and commute through traffic to get to work. At work, the custodial staff wipes down a shared table with disinfectant. At home, you cook dinner, clean the kitchen and run the dishwasher.
Each of these ordinary moments can involve exposure to chemicals. By itself, that is not a reason for concern. After all, chemicals make up the entire physical world.
But depending on the dose, timing and circumstances of exposure, some chemicals in our environment -- both naturally occurring and human-made ones -- may affect health.
Most everyday exposures occur at low levels, and many products are designed and regulated with safety in mind. But as a board-certified toxicologist who studies how chemical exposures affect human health, I rarely ask whether a single chemical is safe in isolation.
