A new system which labels food using a star-based nutrition scale could mislead consumers, a nutritionist says. The Government is poised to confirm New Zealand will adopt the Healthy Star Rating system used in Australia, but on an opt-in basis. Read earlier New Zealand Herald exclusive story: Choice! Food goodness at a glance The Australian system is similar to our energy-use ratings for domestic appliances, and rates packaged foods from half a star to five stars. The most unhealthy products, such as soft drinks, rank one star. Most cereals rank around two and a half. The healthiest, five-star products, include trim milk and plain yoghurt. Auckland nutritionist and Nutrition Society of New Zealand member Lynda Smith said the system was simplistic and likely to mislead consumers. "It's the whole lifestyle and the whole day's food, not just one thing they're buying at a time at the supermarket," she said. "Not everyone should be drinking blue milk, it's not the best thing for everyone." Ms Smith was "dismayed" to see orange juice got a 4.5 out of 5. "I wouldn't want people to think it was a good thing to have a lot of." The cost of manufacturers labelling their products would outweigh the message, which wasn't hugely effective. "Who doesn't know that fizzy drink is bad? Do we really need a number one on it to tell us that?" The types of people who bought soft drinks were unlikely to take any notice of a one star rating, she said. Heinz Wattie's nutrition manager Julie North said the star ratings would be a move in the right direction. "We're positive about the system, we think it's a sensible move forward for consumers and for everyone in the field." Any moves to help consumers understand more about food was a good thing, and the system had been "well considered" in its development, she said. For the ratings to be a success, companies would have to get on board. New Zealand food manufacturers had been providing good information on products since the Food Standards Code changed in 2002. But a five-star rating was "one further tool", she said.