Fish from a fish-and-chip shop is included in this recommendation, although the NHS warns that fried and battered fish contains a higher fat content.
Henry Colbeck - which supplies fish-and-chip shops with food, cleaning products, and packaging - has produced Lite-Bite boxes, which allow takeaways to offer a smaller sized portion of food to its customers.
Danny White-Meir, owner of Enoch's fish-and-chip shop, Llandudno Junction, North Wales, says he's been forced to increase the price of his cod by around 30p over the last 12 months, on top of a rise in potato prices.
Fish-and-chip shops all over Wales have been forced to bump up the cost of their fare as bad weather and concerns over cod stocks in the North and Irish Seas have driven up prices.
Mrs Lodge said potatoes used in Fish-and-chip shops are now selling for pounds 130 per tonne compared with pounds 90 last year.
People are complaining because they've gone up quite a bit, but most Fish-and-chip shops have put up prices.'