The Tasty cheese which is found in New Zealand is not the same as what's in Australian supermarkets.
The Statistics New Zealand food price index shows vegetable prices rose 15 percent in June.
Plan menus around sales, look for home brands and avoid pre-packaged foods.
Jacinda Ardern announced the market study on Thursday.
A Consumer NZ survey has found certain grocery items are always 'on special'.
The Statistics New Zealand food price index shows record-high prices for courgettes, tomatoes and lettuces.