Do we really know what makes us fat?

https://www.latimes.com/opinion/story/2021-09-26/obesity-weight-gain-models-calories-insulin-carbohydrates?fbclid=IwAR0a0o1yflUuhpLVjsfwhiEolXd9t9dYFkmMGmB_SeVMJ7nkdP79f5plZFQ