It seems that our own estimation of the calories we ingest can highly influence our mood and body-image satisfaction. In the study the cereal breakfast was perceived to be lower in calories and that it allowed the participants to be more satiated, happier, more relaxed and more satisfied about weight and body compared to the muffin breakfast. Moreover, fibre and micronutrient daily intakes were superior in women having the cereal breakfast.
Source: School of Natural Sciences & Psychology, UK, 13 Oct 2010