Getty Images; Chelsea Jia Feng/BI
- A landmark study suggested we eat about 500 extra calories per day on ultra-processed diets.
- Scientists are working to disentangle why this happens.
- They're developing new recipes for ultra-processed foods they hope will be healthier.
It's been five years since nutrition scientist Kevin Hall made a startling discovery that changed the way we view ultra-processed foods.
Hall put 20 people — 10 women and 10 men — into...