Lay summary
Smell and taste play an important role in determining our food choices and general health. These senses can be impaired by environmental exposures, as well as life experiences and modifiable lifestlye factors. One factor that may influence smell and taste perception is sleep quality and duration, however, there is limited research in this area. The aim of this research is to understand what is known so far about the relationship between sleep and smell and taste function, what the gaps are, and the direction for future research. The research has important implications for nutrition in ageing and understanding the relationship between sensory perception and obesity.