This study aims to investigate the effects of Cognitive Behavioral Therapy for Insomnia (CBTi) on both sleep patterns and dietary habits in Lebanese adults with insomnia. Sleep patterns and dietary habits are intricately linked, with dysregulated sleep associated with poor diet quality and increased snacking. Conversely, the types of nutrients consumed can affect hormonal balance and circadian rhythm. Insomnia and obesity are interrelated public health concerns, with CBTi showing efficacy in improving sleep. This study will recruit participants with insomnia and randomly assign them to receive either CBTi or basic sleep hygiene education. Baseline assessments will include validated questionnaires about insomnia, dietary habits, and physical activity and a 7-day 24-hour diet recall sheets, as well as actigraphy for sleep parameters, and physical activity assessments. The intervention will last for four weeks, with post-intervention assessments conducted similarly to baseline.