School pupils in Glasgow who buy lunch outside school are likely to be consuming too much energy, fat and salt, a survey has found.
The Glasgow Centre for Population Health study bought 45 lunch items around five secondary school areas.
It found 37 samples did not comply with one or more of the nutrient standards for fat, saturated fat and salt.
The study concluded that more needed to be done to encourage healthier "stay-on-site" lunchtime eating among pupils.
The research was led by Fiona Crawford, from Glasgow Centre for Population Health.