WHAT'S REALLY IN OUR FOOD

Nov 14, 2025

Dr. Karl is one of Australia’s best-known science communicators, and his Shirtloads of Science podcast often brings in experts to break down complicated topics. In this episode, he talks with Professor Clare Collins, a leading nutrition researcher at the University of Newcastle, about what really goes into our food.

They sort out the difference between processed and ultra-processed foods, explain why additives like emulsifiers and flavor enhancers show up in so many products, and look at what current research says about their impact on health. Collins also offers practical, everyday advice for navigating the grocery store without feeling overwhelmed.

If you want more from her, she runs a free site called No Money No Time, which offers simple, budget-friendly nutrition guidance and recipes.