eLife Assessment
This study investigates a dietary intervention that employs a smartphone app to promote meal regularity, findings that have theoretical or practical implications for a subfield and may be clinically useful. The intervention to entice participants to adhere to specific meal times represents a restrictive diet (even though it does not ask to limit caloric intake) similar to a time-restricted feeding diet, while the control subjects are not experiencing or adhering to dietary restrictions. The authors report significant weight loss but did not rigorously assess caloric intake which remains a weakness of this study as food diaries are notoriously unreliable. While the concept is very interesting, the study is considered incomplete, and the rigor of the results should be strengthened in follow-up studies to add more stringent methods to assess caloric intake. Additionally, the study hypothesizes that the intervention resets the circadian clock. However, the study needs an objective method for assessing circadian rhythms, such as actigraphy, in addition to a subjective questionnaire.