Do you remember the healthy food pyramid? In the 1980s and 90s, the diagram was used to show which foods to eat most and which to eat least. It was replaced in Australia and the United States by a plate in the 2010s, but now — spurred by RFK Jr and the MAHA (Make America Healthy Again) movement — the pyramid is back. Sort of: it's now upside down. For the first time, the guidelines acknowledge the harm caused by ultra-processed foods. So why are some dietitians critical of the new pyramid? And what can Australians expect from our own updated guidelines, due later this year?