In this conversation, Dr. Chris Knobbe discusses his journey from being an ophthalmologist to a public health advocate focusing on the dangers of processed foods and industrial seed oils. He highlights the relationship between the rise in use of seed oils and the increase in chronic diseases such as obesity, diabetes, and heart disease. Dr. Knobbe emphasises the need for a shift in dietary guidelines to eliminate seed oils and promote ancestral diets, arguing that the current reliance on processed foods is detrimental to public health.