In this episode, Dr. Lynette Johnston joins us to explore the science, use, and safety of one of the most common artificial food colors: red dye #40. Dr. Johnston explains where this dye shows up in our everyday lives, and why it is used so extensively in our food system. We discuss how the FDA regulates artificial dyes, what current research says about potential health effects, and how dose, context, and individual sensitivities play a role in understanding risk. She also dives into natural alternatives, their limitations, and how cost, stability, and consumer expectations influence which dyes food companies choose. Tune in to hear how Dr. Johnston helps us navigate labels, media headlines, and ingredient choices while emphasizing that staying informed and supporting research is key to a safe and resilient food supply. Learn more about Dr. Johnston’s work below:NC State Bio Page: https://cals.ncsu.edu/food-bioprocessing-and-nutrition-sciences/people/lmkleman/ Check out the following resources to learn more about today’s topic:Center for Science in the Public Interest: https://act.cspinet.org/a/evg-ps-donate-ep?ms=&sourceid=1129207&gad_source=1&gad_campaignid=20127461743&gbraid=0AAAAAD_usrhrHwm6eDWjKOX6425_pjVHS&gclid=CjwKCAjw7fzDBhA7EiwAOqJkhyEZykFAVk0xhoSCfqf9DryoHtb59X-MXuW-D9RexbJJVEuPMvjcpBoCFakQAvD_BwE US FDA Color Additives: https://www.fda.gov/industry/color-additives The Science That Feeds Us podcast brings together extension agents, faculty specialists, and scientists for interdisciplinary conversations on emerging trends in agriculture and the food system. Designed to inform and engage both professionals and curious consumers, we highlight the stories behind the science to build deeper connections to food and agriculture research. The Science That Feeds Us is supported by NC State Extension and NC State University.Edited and Produced by: Bhavisha GulabraiMusic: Podcast theme music by Transistor.fm. Learn how to start a podcast here.

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