Night Shift Work, Diet, Meal Timing, and Cardiometabolic Risk: An Exploratory Cross-Sectional Study in Italian Cement Workers

Rotating shift work, including night shifts, is reported by one-fifth of workers in the EU27 survey and is associated with an increased risk of cardiovascular disease. Irregular meal timing and poor dietary habits related to shift work contribute to metabolic disorders and may further elevate cardiovascular risk. In this pilot study, 14 rotating shift workers including night shifts (NSWs) and 14 regular daytime workers (DWs) underwent assessments of blood pressure, body mass index (BMI), waist (W) and hip (H) circumference, triglycerides, HDL, and LDL cholesterol. All participants also completed questionnaires evaluating nutrient quality, meal timing over a week, and lifestyle factors. In NSWs, a disrupted eating schedule was observed during both workdays and rest days, with frequent lunch skipping in favour of high-fat snacks. Weekly intake of junk food was higher (p < 0.01) and fresh vegetable consumption lower (p < 0.05) in NSWs compared to DWs. BMI, W/H ratio, and triglyceride levels were slightly higher in NSWs. Active smoking was more common among NSWs (50%) than DWs (21%, p < 0.01). Excess body weight, dyslipidemia, and higher smoking prevalence—combined with a long-standing pattern of unhealthy eating may, along with circadian misalignment, contribute to the elevated cardiometabolic risk observed in otherwise healthy NSWs. Implementing workplace policies to improve nutrient quality and meal timing may help reduce the risk of cardiometabolic disorders in this population.