If you’ve purchased plastic related drinking containers you’ve surely noticed many products touting their "BPA-free" status. BPA or bisphenol-A is a chemical used to harden plastic and has received much bad press over the recent years due to studies linking it to brain and behavior issues in children and infants, altered hormone levels, obesity and cancer, to name a few. Unfortunately, new research from Canada shows the replacement being used for BPA, BPS or bisphenol-S, has now also become a cause for concern. Researchers from the University of Calgary have now found BPS to cause changes in the brain development of zebra fish embryos at extremely low doses. Authors of the study state their findings are directly relevant to humans, especially for women in their second trimester of pregnancy.