abbie boudreau, abc news, los angeles. Now, a new lawsuit that claims frozen pizza could cause cancer. It targets nestle foods for a toxic chemical. Reporter: The woman is rtrying to take a slice out... See More
abbie boudreau, abc news, los angeles. Now, a new lawsuit that claims frozen pizza could cause cancer. It targets nestle foods for a toxic chemical. Reporter: The woman is rtrying to take a slice out of the multimillion dollar pizza industry. Suing the company responsible for about half of all frozen pizzas. It's the $5 million pizza battle that could heat up a california courtroom. This morning, the pizza companies are coming under fire. Taking on nestle, who produces all three brands, katie simpson of san diego. She argues the company is placing profits over public health, by not removing transfats from their pizzas. Katie has two young children. She likes to make pizza for them. All kids love pizza. It should haven't a toxic food add active that's banned in parts of the world. Reporter: California and 13 styes across the u.S. Bans transfats in foods at restaurants. There are no bans on transfats in packaged foot foods. The fda and usda only require that companies list all of the ingredients on the label. When simpson was pieing her favorite frozen pizzas, she had no idea they had what the suit culls a toxic carcinogen. IN 2005, McDONALD'S PAID $8.5 Million after being sued not been honks about transfat levels in their foods. It's clear they haven't broken rules. Reporter: They tell us we will rigorously defend ourself. All of our foods are in compliance. I reached out to california pizza kitchen. They want you to know that this lawsuit is not related to the restaurant. Only the frozen pizzas that nestle makes using the cpk brand. Back to sam with more weather.
This transcript has been automatically generated and may not be 100% accurate.