Which of the following are primary dietary risk factors for gallstones?

• A. All of the above
• B. High fat diet
• C. Low fiber
• D. Obesity

Answer: (A)

Gallstones form when bile becomes saturated with cholesterol and the gallbladder isn’t moving bile out efficiently. Obesity increases cholesterol production and secretion into bile and is linked to slower gallbladder emptying, which raises stone risk. A diet high in fat can raise biliary cholesterol content, contributing to saturation and stone formation, especially with larger or more frequent meals. Low fiber reduces the beneficial effects of fiber on bile acid binding and cholesterol metabolism, and it’s associated with changes in bile acid circulation and stool patterns that can favor stone development. Since each of these dietary patterns—obesity, high fat intake, and low fiber—contributes to the risk, all of the above is the best choice.