Fried food is high in fat and can lead to stomach aches and diarrhea.
Sugar alcohol
Candy, gum, and other sugar-free foods made with sugar alcohols can cause gas and upset stomach in some folks.
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High fructose corn syrup
High fructose corn syrup is a sweetener used to make candy and pastries, and it can cause gas, diarrhea, bloating, and cramps in some folks.
Citrus fruit
Some people get heartburn from oranges, grapefruits, lemons, and limes. Citrus foods relax the esophageal sphincter, allowing acid to enter and produce heartburn.
Peppermint
Some people get heartburn from peppermint. Peppermint relaxes the stomach-esophageal sphincter.
Bean
Oligosaccharides, fermentable fibers in beans, can induce gas, bloating, and stomach pain. Because they bypass the stomach and enter the colon, they're good for the gut.
Cruciferous vegetable
Cabbage, broccoli, kale, and collard greens are cruciferous vegetables. They include sugars like beans that cause gas, bloating, and stomach pain.
Spicy food
Spicy food relaxes the sphincter (valve) between the stomach and esophagus, allowing acidic food to reflux into the esophagus and cause heartburn.
Chocolate
Like peppermint and citrus fruit, chocolate relaxes the esophageal sphincter, causing heartburn and indigestion. It depends on the person.