Hughes said the bill contained powers under the Fair Trading Act for Commerce and Consumer Affairs Minister Kris Faafoi to add more foods later.
The law change was initially designed to cover all single-ingredient foods but the parliamentary committee said it was better to start with a simple approach.
There had been concern that cured pork products were not included in the bill but Hughes said there was a late inclusion during the select committee process which made the bill more palatable.
"We got bacon and pork products back into the bill. We got bacon in, literally in the 11th hour," Hughes said.
"That was a biggie because 85 per cent of our bacon and ham comes from overseas and 95 per cent of that's from countries with worse animal welfare standards."
National's food safety spokesman Nathan Guy said the committee had made changes to the bill to get it to a stage where National could support it. Act leader David Seymour said the law would effectively act as a new tax on consumers.
Once the law is signed off, there will be 18 months for regulations to be put in place before the new labels are phased in over six months for fresh food and two years for frozen.