Early Design Choices Cut Chemical Harm

The goal of Safe and Sustainable by Design (SSbD) is to stop bad chemicals from hurting people before they become a problem. Scientists use a new way of looking at all the times we might be exposed to chemicals, called the life‑course exposome. By mixing these ideas, a new workflow has been created to decide which chemicals should be kept or replaced. First, the team thinks about who is most at risk and when they are most vulnerable. Next, they pick the right laboratory tests that show how a chemical might act inside the body. These tests are linked to maps of how chemicals cause damage, called Adverse Outcome Pathways (AOPs). Then, computer models predict how much of the chemical would actually reach a person’s body.All this information is put together in a clear, step‑by‑step decision chart. The chart helps designers choose chemicals that are safe early on, saving time and money. An example shows how a common plastic maker, bisphenol A (BPA), is compared to two other chemicals. One alternative looks similar to BPA, while the other comes from a natural source. Using lab data and computer models, the team can see that the natural option has little harmful activity, so it can move forward. The similar alternative shows enough potential harm to be reconsidered or improved before use. By matching lab results with the life‑course timeline, this method reduces animal testing and focuses research on what really matters for human health.