About 500 million people worldwide are unable to access tampons, pads, and other menstrual products due to financial constraints. This forces them to use temporary objects, from socks to toilet paper, to try to manage their periods. Activists say this has a profound effect not only on their physical health, but also their mental health. In August, Scotland became the first country in the world to guarantee the right to menstrual period products. Lawmakers told TIME why this new initiative was so important.