--- title: Emulsifiers in Processed Food Cause Cancer in Mice description: Processed foods aren’t healthy, but the latest study shows that emulsifiers, which are added to many foods, can cause cancer in animals canonical: https://time.com/4559107/processed-food-additive-emulsifier-cancer/ author: Alice Park article:opinion: false article:content_tier: free article:published_time: 2016-11-07T18:20:24.000Z article:modified_time: 2026-02-23T01:38:42.614Z article:section: Health og:title: This Common Processed Food Ingredient Causes Cancer in Mice og:description: Processed foods aren’t healthy, but the latest study shows that emulsifiers, which are added to many foods, can cause cancer in animals og:url: https://time.com/4559107/processed-food-additive-emulsifier-cancer/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt641adb3cba45df1c/6988ad57e20a878468a931de/ice-cream-cone.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 5174 og:image:height: 2910 og:image:alt: fallen Ice Cream Cone og:type: article twitter:card: summary_large_image twitter:title: This Common Processed Food Ingredient Causes Cancer in Mice twitter:description: Processed foods aren’t healthy, but the latest study shows that emulsifiers, which are added to many foods, can cause cancer in animals twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt641adb3cba45df1c/6988ad57e20a878468a931de/ice-cream-cone.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # This Common Processed Food Ingredient Causes Cancer in Mice > Sponsored content. 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Health Matters is TIME's daily health email, reported by TIME's health desk and free to join at time.com/newsletters. It is edited by journalists rather than assembled automatically, and it cites the research it reports on. #### Is Health Matters free? Yes. Health Matters is a free daily newsletter from TIME, available at time.com/newsletters. #### Who reads TIME's Health Matters newsletter? Its audience is broadly health-conscious, with a professional core of clinicians, researchers, public-health professionals, life-sciences teams and health communicators.  by [Alice Park](https://time.com/author/alice-park/)  ## Alice Park Senior Correspondent Nov 7, 2016 6:20 PM UTC  Ice cream cone smashed on white background Ice cream cone smashed on white backgroundGetty Images  by [Alice Park](https://time.com/author/alice-park/)  ## Alice Park Senior Correspondent Nov 7, 2016 6:20 PM UTC What’s good for keeping food products stable and safe on the shelf may not be healthy for the body. Researchers report in the journal _Cancer Research_ that emulsifiers create the ideal conditions for triggering [colon cancer](http://time.com/4543570/theres-a-less-invasive-alternative-to-colonoscopy/) in mice. [Emulsifiers](http://time.com/4252515/calories-processed-food/) are chemicals—in some cases detergents, actually—added to blend oily and water-based ingredients in processed foods and to keep them consistently mixed so they don’t separate. Processed foods often contain several of them; food regulations limit the amount of each emulsifier present in a particular food product to 1% to 2%, but they don’t restrict the number of emulsifiers allowed. Emilie Viennois from the Institute of Biomedical Sciences at Georgia State University, who led the new research, showed in earlier work that emulsifiers changed the [good bacteria](http://time.com/4505831/weight-fat-microbiome/) living in the guts of mice. These changes promoted [metabolic syndrome](http://time.com/3887131/metabolic-syndrome-obesity/), which is a risk factor for certain chronic diseases such as diabetes, obesity and heart disease, and inflammation; those in turn have been connected to inflammatory bowel disease (IBD). Some cases of IBD can trigger tumors to grow. In her latest study, Viennois wanted to connect the dots to focus on whether emulsifiers affected cancer risk: specifically colon cancer. After three months of feeding some animals two common ones—polysorbate 80 and carboxymethylcellulose—in their water, she found that animals who consumed emulsifiers showed changes in their gut microbes that were consistent with promoting tumor growth. Using a theoretical model for conditions that promote colon cancer, she found that the higher levels of inflammation created by the microbial changes form the perfect cancer friendly environment. “We think that can create a niche for tumor development,” she says. Whether the same thing happens in people to increase their colon cancer risk isn’t clear. But Viennois notes that most processed foods contain several different types of emulsifiers, and in her study, she only tested two emulsifiers in the mice. She is continuing her work to better understand the role that emulsifiers play in tumor growth in the animals, and is also collaborating with other groups to research the connection in people. She plans to look at things such as the gut bacteria populations and how they change, as well as body weight and blood levels of cancer and metabolic markers. For now, however, “I would tell people to try to cook instead of using food industry products,” she says, since many processed foods contain emulsifiers. “In meals, mix processed foods with some homemade food so you don’t have huge exposure to emulsifiers in one meal.” ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/4559107/processed-food-additive-emulsifier-cancer/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/4559107/processed-food-additive-emulsifier-cancer/"},"headline":"This Common Processed Food Ingredient Causes Cancer in Mice","datePublished":"2016-11-07T18:20:24.000Z","dateModified":"2026-02-23T01:38:42.614Z","description":"A new study shows that emulsifiers, which are added to many processed foods, can cause cancer in animals","url":"https://time.com/4559107/processed-food-additive-emulsifier-cancer/","keywords":["Diet & Nutrition","medicine","Food","Obesity"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt641adb3cba45df1c/6988ad57e20a878468a931de/ice-cream-cone.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Alice Park","jobTitle":"Senior Correspondent","url":"https://time.com/author/alice-park/"}],"articleSection":"Health","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt641adb3cba45df1c/6988ad57e20a878468a931de/ice-cream-cone.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"fallen Ice Cream Cone","caption":"fallen Ice Cream Cone","creditText":"Getty Images","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/health/","name":"Health"}},{"@type":"ListItem","position":2,"item":{"@id":"/tag/dietnutrition/","name":"Diet & Nutrition"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/4559107/processed-food-additive-emulsifier-cancer/","name":"This Common Processed Food Ingredient Causes Cancer in Mice"}}]}] ```