“Chewing gum stays in your stomach for seven years.”

The idea that a swallowed piece of chewing gum will linger in your stomach for seven years is a widespread misconception, often passed down through generations. While the exact origin of this particular "seven-year" figure is unclear and likely lost to folklore, the myth probably stems from a combination of parental warnings and the perceived stickiness and indigestibility of gum itself. Parents may have used this exaggerated claim to discourage children from swallowing gum, a habit that, while generally harmless in small amounts, could theoretically pose a choking hazard or, in very rare cases of excessive consumption, lead to issues.

Scientifically speaking, your digestive system is remarkably efficient at processing everything you ingest, whether it's fully broken down for nutrients or identified as waste. While the gum base, which gives gum its chewy texture, is largely indigestible by human enzymes, the rest of the gum's components—like sweeteners and flavorings—are digested. The indigestible gum base simply passes through your digestive tract, much like other fibrous materials or things your body can't break down, such as corn kernels.

Rather than remaining lodged for years, a swallowed piece of gum typically travels through your system and is expelled from the body within a few days, usually within 24 to 72 hours. The belief that gum would stick to the stomach walls is unfounded, as the stomach's environment and the constant movement of the digestive tract prevent such an occurrence. Although swallowing a single piece of gum is generally harmless, regularly swallowing large quantities of gum, especially for children, could, in extremely rare instances, contribute to an intestinal blockage. However, this is an exception and not evidence that gum lingers for seven years.