Lifestyle changes in the past few decades have resulted in irregularity in sleep and meal timings. People are taking less sleep and resorting more to unhealthy food and eating habits. These factors are the most important health determinants. Sleep, food choices and eating habits are closely associated with each other. Thus, the crosstalk between circadian rhythms, sleep, and food needs urgent attention and discussion for better health management. Various research studies indicate that a healthy trend in sleep augments the regularity in meal timings and good eating habits. Healthy food and eating habits, in turn, boost sleep quality. Deterioration in the quality of anyone adversely affects the other. Several health disorders like obesity, diabetes, cancer, cardiovascular problems, and low immunity can be linked to these disturbances. The present review considers several previous studies to point out the inter-relationship between sleep and eating habits and the various health disorders arising from poor attention. Poor sleep promotes the tendency to eat junk food or eat at odd times, such as snacking late at night, leading to weight gain and other health problems. Junk food and unhealthy eating habits cause sleep disturbances. This inter-relationship of sleep and food preferences is important as it can have important treatment implications for health disorders arising due to these modifiable behavioural factors. Circadian alignment, improvements in sleep timings, and healthy eating habits have positive effects on other health behaviours as well.
