True or False: If You Swallow Your Gum, It Will Take Seven Years to Digest
As a child, you heard the familiar threat from your mother: if you swallow your chewing gum, it will be stuck in your stomach for seven years. And while you hate to dispute your mother's wisdom, most adults probably have trouble swallowing that warning. And for good reason—it's not really true. While it’s generally a good idea to spit out your gum when the flavor runs out, swallowing it occasionally is fairly harmless in small pieces. Gum passes through your system pretty much just like other food, exiting the body in the same way.
Evidence for the Health Claim
Chewing gum is made of the following main ingredients: a natural or synthetic gum base, glycerin, vegetable-oil based compounds, sorbitol and mannitol or saccharin, preservatives, flavorings, and colorings. While the majority of these can be easily digested, the gum base can’t be broken down, so it passes through the digestive tract and out the body intact.
Because the gum base can’t actually be digested, there have been documented cases of swallowed chewing gum causing intestinal obstruction. Pediatricians at the Nemours Children's Clinic Division of Gastroenterology and Nutrition describe two unrelated cases of children suffering from chronic
Evidence Against the Health Claim
Chewing gum has been part of human culture since at least 7,000 BC, the approximate date to which masses of prehistoric tar marked with teeth imprints can be traced. The Greeks, North American Indians, and other people indigenous to North America have all chewed gum for millennia, it is believed. The first patented chewing gum hit shelves in the US in 1869.
Today, chewing gum comprises a hefty portion of the $21 billion American candy industry. Yet gastrointestinal illnesses attributed to chewing gum appear to be few and far between. Since gum is typically chewed in small pieces, a single swallowed piece will travel the expected digestive path and pass—primarily intact—in the stool in just a few days time.
The seven-year myth may have sprung from a misconception of gum’s digestibility based on the look and feel of gum. After all, it doesn’t dissolve in your mouth like other foods. Or, maybe it was mom’s clever way of scaring you into not swallowing your gum and freeing up your mouth for another piece!
Chewing gum. Wikipedia website. Available at:. http://en.wikipedia.org/wiki/Chewing_gum . Accessed November 5, 2008.
Hopcroft K. Is it true that swallowing chewing gum can block your bowel? Times Online website. Available at: http://www.timesonline.co.uk/article/0,,8125-2227564,00.html . Accessed July 24, 2006.
Kruszelnicki KS. Great moments in science—chewing gum. The Australian Broadcasting Corporation website. Available at: http://www.abc.net.au/science/k2/moments/s1366318.htm . Accessed November 5, 2008.
Lawrence J. Medical myths debunked. MedicineNet.com website. Available at: http://medicinenet.com/script/main/art.asp?articlekey=46642 . Accessed November 5, 2008.
Mikkelson B. The seven year glitch. Urban Legends Reference Pages. Snopes website. Available at: http://www.snopes.com/oldwives/chewgum.asp . Accessed November 5, 2008.
Milov DE, Andres JM, Erhart NA, et al. Chewing gum bezoars of the gastrointestinal tract. Pediatrics . 1998 August; 102(2):e22. Pediatrics website. Available at: http://pediatrics.aapublications.org/cgi/content/full/102/2/e22 . Accessed July 22, 2006.
Picco M. Chewing gum: is swallowing it harmful? Ask a digestive system specialist. The Mayo Clinic website. Available at: http://www.mayoclinic.com/health/digestive-system/AN01006 . Accessed November 5, 2008.
What happens to swallowed gum? The Nemours Foundation website. Available at:
http://www.kidshealth.org/kid/talk/yucky/swallowed_gum.html . Accessed November 5, 2008.
Image Credit: Nucleus Communications, Inc.
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
Copyright © 2007 EBSCO Publishing All rights reserved.