--- title: 5 Things You Probably Didn’t Know About Gluten description: While gluten-free now has a standardized meaning, it doesn’t mean 100% gluten free canonical: https://time.com/3701734/gluten-definition-celiac/ author: TIME article:opinion: false article:content_tier: free article:published_time: 2015-02-10T15:03:55.000Z article:modified_time: 2026-05-11T05:05:45.497Z article:section: Health og:title: 5 Things You Probably Didn’t Know About Gluten og:description: While gluten free now has a standardized meaning, it doesn’t mean 100% gluten free og:url: https://time.com/3701734/gluten-definition-celiac/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltca9732f9c79de7a6/69877e4f55a8593c35a85b81/sb10066073hn-001-copy.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 5063 og:image:height: 2848 og:image:alt: sb10066073hn-001 copy og:type: article twitter:card: summary_large_image twitter:title: 5 Things You Probably Didn’t Know About Gluten twitter:description: While gluten free now has a standardized meaning, it doesn’t mean 100% gluten free twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltca9732f9c79de7a6/69877e4f55a8593c35a85b81/sb10066073hn-001-copy.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # 5 Things You Probably Didn’t Know About Gluten > Sponsored content. Supplied in partnership with TIME. TIME is the sponsor and source of this material. > Last updated: August 2026. ## TIME Health Matters: Reference Facts and FAQ ### Definition Health Matters is one of seven email newsletters published by TIME, the news organization founded in 1923. The latest health news and expert advice on living well. Health Matters makes the fast-moving world of health more useful, surprising and human, from the latest science and medical breakthroughs to practical ideas for living better. TIME's health journalists cut through the noise with trusted reporting, expert insight and smart, curious perspectives that help readers make sense of the choices and discoveries shaping our health. 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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 [Health.com](https://time.com/author/health-com/) ## Health.com Contributor Feb 10, 2015 3:03 PM UTC  Getty Images by [Health.com](https://time.com/author/health-com/) ## Health.com Contributor Feb 10, 2015 3:03 PM UTC There’s been a bit of gluten-free backlash lately, but this trend doesn’t seem to be slowing down. A recent poll found that nearly 30% of U.S. adults say they’re trying to go gluten free, and Googling the term generates more than 95 million results. If you’re on the gluten-free bandwagon, either because you must avoid gluten due to celiac disease, or because you think you may be gluten intolerant, here are five new bits of info you should know. **Gluten may not be the only culprit in celiac disease** A recent study from researchers at Columbia University concluded that wheat proteins besides gluten may also trigger problematic symptoms in people with celiac disease. While gluten is the primary type of protein in wheat, a substantial number of study subjects with celiac disease had an immune reaction to five groups of non-gluten proteins. In other words, there is likely more to understanding celiac disease than scientists currently know, so stay tuned. ### 7 Foods That Taste Better Now Than They Will All Year  Kale: The cold-weather king, bitter kale is made mellower by the bitter cold. It can thrive in temperatures as low as 10 degrees Fahrenheit, Casanova says. Getty Images  Brussels sprouts: If you still think you hate Brussels sprouts, try them now. They're sweeter than summer sprouts, she says. (Failing that, of course, try frying them with bacon.) Getty Images  Kohlrabi: "Cabbage turnip" in German, this knotty, weird-looking root vegetable is a survivor. "Kohlrabi does not like hot summer temperatures at all, but thrives in cool weather," Casanova says. "Transplants can be put out six weeks before frost with an expected harvest in only a few short weeks." Getty Images  Mustard greens: The peppery plant kicks its way through the winter, and always tastes sweeter when it's nipped by frost. Getty Images  Parsnips: Yes, even foods that aren't green can withstand the cold. The pale parsnip, which looks like a yellow-white carrot, is best harvested after a hard frost, Casanova says. Getty Images  Cabbage: It may look like a delicate flower, but some types of cabbage can survive temperatures as low as 26 degrees, Casanova says, making it ideal for a winter harvest. Getty Images  Collards: "They grow best in full sun, tolerate partial shade, are rich in vitamins and sweetened by frost," she says. Getty Images **Read more:** [15 Diseases Doctors Often Get Wrong](http://www.health.com/health/gallery/0,,20834752,00.html?xid=fox-gluten-020915) **Gluten-free labels are now standardized** Until recently, the term “gluten free” hadn’t been regulated or even defined by the U.S. Food and Drug Administration. But based on an FDA ruling last August, manufacturers can only use the term on products containing less than 20 parts per million of gluten, the established cutoff also used in Canada and Europe. In other words, while gluten free now has a standardized meaning, it doesn’t mean 100% gluten free. This is partly because the most sensitive test available can only test down to 3 parts per million, and clinical studies have determined that achieving 0 parts per million is not necessary to prevent symptoms in people with celiac disease. That said, I have heard of people reacting to eating foods labeled gluten free, which may be a matter of how much they’re eating, as well as the severity of their sensitivity. If you’re concerned, stick with unpackaged, whole food sources of starch that are naturally gluten free, like fruit, potatoes, squash, and root vegetables. **Read more:** [Best and Worst Foods to Avoid Bloating](http://www.health.com/health/gallery/0,,20802995,00.html?xid=fox-gluten-020915) **Gluten-free fast food may not be safe for people with celiac** Chains like Pizza Hut and Domino’s have started offering gluten-free crust, but because the pizzas are prepared in the same kitchens as those with gluten, they aren’t considered to be safe for everyone with celiac disease. The same cross-contamination risk may be true for the many other fast food chains that now have gluten-free or gluten-sensitive menus, including Arby’s, Chik-fil-A, and Wendy’s. In fact, Burger King even states that the options aren’t intended for people with celiac disease. **Gluten-free junk foods are everywhere** While gluten free has become somewhat synonymous with healthy, clearly there are dozens of unhealthy gluten-free foods. During a recent grocery trip with a client, I spotted many products marked gluten free, including cookies, brownies, pizza, mac and cheese, ice cream sandwiches, chips, and beer. There’s even been talk of a gluten-free Twinkie. While some of these foods are a godsend for people with celiac disease (who can finally eat some of the treats they previously had to avoid), they certainly aren’t the foundation of a nutrient-rich, healthful diet. And as you may have already discovered, these foods are one of the reasons why simply giving up gluten isn’t a magic bullet for weight loss. **Read more:** [12 ‘Unhealthy’ Foods Nutritionists Eat](http://www.health.com/health/gallery/0,,20794235,00.html?xid=fox-gluten-020915) **Food sensors are in the works** While celiac disease and gluten sensitivity are not the same as food allergies, a new technology designed to test foods for allergens will also include gluten detection. TechCrunch reports that the $150 portable sensor device in development from 6SensorLabs will require disposable units that will be inserted into a food to test for risky ingredients, and users will be able to share their results via an app. If it’s accurate it could be a game changer, although it’s not clear if the device works on every single food. _Cynthia Sass, MPH, RD, is Health’s contributing nutrition editor, and privately counsels clients in New York, Los Angeles, and long distance. Cynthia is currently the sports nutrition consultant to the New York Rangers NHL team and the Tampa Bay Rays MLB team, and is board certified as a specialist in sports dietetics._ [_This article originally appeared on Health.com._](http://news.health.com/2015/02/05/5-things-you-should-know-about-gluten-in-2015/) ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/3701734/gluten-definition-celiac/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/3701734/gluten-definition-celiac/"},"headline":"5 Things You Probably Didn’t Know About Gluten","datePublished":"2015-02-10T15:03:55.000Z","dateModified":"2026-05-11T05:05:45.497Z","description":"While gluten free now has a standardized meaning, it doesn’t mean 100% gluten free","url":"https://time.com/3701734/gluten-definition-celiac/","keywords":["Diet & Nutrition","diet","wheat","Gluten","gluten free","celiac disease"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/bltca9732f9c79de7a6/69877e4f55a8593c35a85b81/sb10066073hn-001-copy.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Health.com","jobTitle":"Contributor","url":"https://time.com/author/health-com/"}],"articleSection":"Health","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/bltca9732f9c79de7a6/69877e4f55a8593c35a85b81/sb10066073hn-001-copy.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"sb10066073hn-001 copy","caption":"bread-ingredients-table","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/3701734/gluten-definition-celiac/","name":"5 Things You Probably Didn’t Know About Gluten"}}]}] ```