EAT-Lancet Diet, Chronotype, and Well-Being in Obesity

The aim of this study is to examine the relationship between the Planetary Health Diet (EAT-Lancet) dietary pattern, chronotype, and psychological well-being in obese individuals. A total of 97 individuals diagnosed with obesity were included in the study. A questionnaire form containing sociodemographic characteristics was administered to volunteers who agreed to participate in the study. In addition, participants' anthropometric measurements (body weight, height, waist and hip circumference, Body Mass Index (BMI)), biochemical parameters (fasting blood glucose, HbA1c, triglycerides, LDL-cholesterol, triglycerides, total cholesterol, C-reactive protein (CRP)), and nutritional status (food consumption record and frequency) were obtained. The Morningness-Eveningness Questionnaire was used to determine chronotype. The Psychological Well-Being Scale was used for psychological assessment.

Mood disorders are common in obese individuals, and anxiety and depression often contribute to weight gain through emotional eating and inactivity. Therefore, including psychological support in obesity prevention and treatment programs is important for long-term weight loss goals. However, chronotype, which describes an individual's behavioral preferences such as sleep timing and eating, is also an important factor in determining both physical and mental health outcomes. An inappropriate chronotype has been associated with a more unfavorable body composition, poor mental health, and an increased risk of depression and anxiety. A review of the literature reveals no studies that simultaneously address the Planetary Health Diet (EAT-Lancet) dietary model, chronotype, and psychological well-being variables in obese individuals; this highlights the originality and necessity of the present study. The aim of this study is to examine the relationship between the EAT-Lancet dietary model, chronotype, and psychological well-being in obese individuals.