Shift-workers skip meals and don't get enough sleep.
A new report from SafeFood has also found one-in-three smoke - significantly higher than the national average.
Two-in-three shift workers don't eat regular meals on work days, and almost eight-in-ten say they're getting insufficient sleep.
The study claims lack of breaks, shift patterns, poor availability of food and tiredness due to long working hours are the most common barriers to leading a healthier lifestyle.