BACKGROUND/OBJECTIVES: Job stress negatively affects physical and psychological health and can lead to behavioral changes such as unhealthy eating. This study aimed to evaluate the relationship between job stress levels, adherence to the Mediterranean diet, and the phytochemical index (PI). METHODS: The study included 200 healthy individuals aged 18-50 working at the Tuzla Gum Factory. Data were collected through demographic and dietary questionnaires, two-day 24-h food records, PI values, and anthropometric measurements. Job stress was assessed using the Job Stress Scale, and Mediterranean diet adherence was assessed with the Mediterranean Diet Adherence Questionnaire. RESULTS: Waist and hip circumference, waist/hip ratio, and BMI were significantly higher in individuals with high levels of job stress ( < 0.01). Unskilled workers reported higher stress than professionals ( < 0.01). Significant differences were found in carbohydrate and fiber intake among males and in energy, protein, carbohydrate, and vitamin A intake among females with varying stress levels ( < 0.01). No significant difference in Mediterranean diet adherence was observed between medium and high stress groups. However, women had higher adherence and PI scores than men ( < 0.01). Diet adherence was better among managers than service-sales and technical staff ( < 0.01). PI scores were higher in medium stress than high stress individuals ( < 0.05) and in those with a higher BMI compared to a normal BMI ( < 0.01). CONCLUSIONS: Job stress influences both anthropometric parameters and dietary habits. Effective stress management may improve adherence to the Mediterranean diet and phytochemical intake. Workplace strategies supporting healthy eating behaviors are recommended.