"Those risks need to be really widely known in the community. It's really good if the experienced women in the family will get around and support a breast-feeding woman, because quite often it's them that discourage [it] - especially if they've got a strong bottle-feeding history," she said.
A Food Standards Australia and New Zealand consultation paper is calling for submissions on proposals, including warning labels that could replace or supplement the "breast is best" statement on infant formula products.
Debate over breast-feeding versus formula has flared this year, with formula-feeding mothers saying they feel vilified for choosing formula - with "breastapo" type tactics on many maternity wards.
The New Zealand Breast Feeding Authority says it is important parents understand the difference between formula feeds and breast-feeding.
Meanwhile, New Zealand scientists are working on developing a baby formula which could match human milk's nutritional quality. The Government has approved a research grant for the University of Otago-led project, trying to find ways of adding oligosaccharides to formula made from cows' milk.
Oligosaccharides have been linked to healthy bacteria in babies' bowels.