Many believe that foods make you put on weight because of...

Many believe that foods make you put on weight because of what it is, rather than how much there is. They often over-emphasize the role of portion content and don't put enough emphasis on portion size. This can lead to people thinking that more radical changes are needed to prevent weight gain than may be the case, and making choices that lead to less personal satisfaction and that they will be less likely to stick to over time.