Vitamin C plays a biochemical role in cholesterol metabolism and bile acid synthesis. To convert cholesterol into bile acids, the liver relies on vitamin C–dependent enzymatic pathways. When this process is impaired, bile can become overly concentrated with cholesterol, increasing the risk of biliary sludge and gallstone formation.
An earlier large observational study found that women with lower blood levels of vitamin C were more likely to have gallbladder disease or undetected gallstones. While this study did not prove causation, it highlighted a plausible relationship between vitamin C status and bile composition.
More recent research continues to support the broader concept that oxidative stress, impaired cholesterol-to–bile-acid conversion, and metabolic dysfunction contribute to gallstone formation and biliary disease. Vitamin C functions as an antioxidant and supports normal bile chemistry, suggesting it may play a supportive role in maintaining healthy bile flow, particularly in people with metabolic stress.
Vitamin C should not be viewed as a treatment for gallbladder disease, but as one factor among many that influence bile quality, alongside insulin sensitivity, liver function, cholesterol metabolism, and overall antioxidant status.
