For several decades, the standard advice to people who want to lose weight has been to eat a low-fat diet. A diet which is low in fat and high in fruit, vegetables whole grain fibre is likely to be healthy. This is why it is the basis of many weight loss programmes such as Weightwatchers and Slimming World.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/low-fat-diet-sheet