Konstantina Antoniadou is an expert sustainability writer, certified in Chemicals and Health by Johns Hopkins University, where she focused on the toxicity of commonly found household chemicals and their health impacts. She has also completed specialized studies in Sustainable Fashion (Copenhagen Business School), Business Models for Sustainability (BMS), and Sustainable Development Goals (University of Copenhagen), deepening her expertise in the connection between personal choices and global environmental change. With years of experience as a senior writer and researcher, Konstantina now leads our reviews of non-toxic home products, beauty and skincare brands, and sustainable fashion. K. is also the creator of the popular 7-Day Non-Toxic Living Challenge, downloaded over 2,000 times and praised for its accessible, science-backed tips.