for whole foods. The popular and trendy market. People are now claiming that their in-house Greek yogurt has more sugar than it says. Reporter: There are several brands of plain Greek yogurt on the... See More
for whole foods. The popular and trendy market. People are now claiming that their in-house Greek yogurt has more sugar than it says. Reporter: There are several brands of plain Greek yogurt on the market. All of them have at least 6 fwrams of sugar a serving. This whole foods brand says it has only two. Which one would you choose? Shoppers looking for the healthiest option in the yogurt aisle are suing whole foods to get their money back. Field in New York on Friday, the class-action lawsuit alleges the health store chain was fully aware of the true sugar content in the store brand of plain Greek yogurt. Customers were unaware until yul, when it was revealed that whole foods 365 didn't have just two grams of sugar per serving but actually had 11.4 gram, more than five times listed amount. This is important not just for our clients but for just overall for consume toers have confidence that what companies are telling them is accurate. It's a health issue. It's a health risk. Reporter: If court documents, attorneys say whole foods sought to give itself a competitive advantage and to use this false statement of contents to induce consumer to purchase their brands. Experts say bad labels can have serious con consequences. Consumers like a die better will be making decision on their daily life and intake based on that label. Reporter: Whole foods tells us it's investigating the consumer reports claim. Saying we strive to provide only the highest quality products. This product was tested by a reputable third party lab using fda-approved testing technology. Until the issue is sorted out, the shoppers will have many other brands of Greek you ert to choose from. Whole foods has pulled its plain yogurt. Nutritionists say it is still batter choice than the flavorered kind that has added sugar in it.
This transcript has been automatically generated and may not be 100% accurate.