Parents need to be educated about healthy eating as they are complaining about fruit and vegetables in their children's school lunchboxes, says a health official. Assistant Director of Health Regina Ching Cheuk-tuen told a Legislative Council panel on health services that instilling healthy eating habits among schoolchildren would require co-operation by parents, schools and lunch suppliers. The department launched the EatSmart@school.hk campaign at primary schools in September, estimating one in five students is obese. It aims to convince lunchbox suppliers to provide healthier food, after a study last year found that 70 per cent of primary school lunches were provided by schools but that many contained items that should be 'strongly discouraged'. Dr Ching said many lunchbox suppliers had taken steps to improve their food and that schools were trying to do what was best. 'But very often parents are not ready to accept the new lunchboxes and they complain about the food through the schools,' he said. The lunchboxes also cost about HK$1 more because of the extra vegetables and fruit, she said. Legislator for the medical sector Kwok Ka-ki asked: 'What can you do exactly to improve the situation? I can see that most tuck shops and school diets do not measure up to world standards.' Democratic Party legislator Yeung Sum said the department's strategy was inadequate. 'You cannot just rely on market forces. Certain foods should be banned in tuck shops, such as [soft drinks]. Look at what has been done in Europe and the US,' he said.