"Some people can be pretty competitive and competitions seem to get people excited about these things," she said.
Skellern recommended developing a nutrition policy to help drive company decisions.
Work Well health improvement adviser Angela Pootjes said businesses would see a significant financial return on their investment in promoting healthy eating among employees.
"As well as reducing sick days, you will also improve productivity by reducing the number of people who are there in body but not in their minds. Many workplace accidents occur because people are not fully concentrating - especially in factories or where people are working with heavy machinery," she said.
Businesses registering an interest in Work Well could do an online assessment of the financial benefits for them and Pootjes said the results were often surprising.
It was also important to look at diet in the wider context of health and well-being, which was the focus of the Work Well programme, and help was out there for people keen to implement healthier workplace policies and practices.
More information on workplace well-being and the Work Well programme can be found at www.workwell.health.nz
10 ways to help your staff develop healthier eating habits
Provide healthy options such as fruit and sandwiches.
Encourage staff to get regular health checks.
Provide clean facilities where staff can make and enjoy proper meals.
Put healthy food information and recipes in the staffroom.
Speak to your staff to find out where there are problems.
Invite experts into the workplace to educate and motivate.
Run competitions - vegetable growing, weight loss etc.
Encourage people to bring in excess seasonal fruit and vegetables from their gardens.
Provide lower-fat "light blue" or "green" milk.
Install a water cooler.