The prevalence increases with age.
Females are more likely than males to have stones.
The gall bladder is an organ located immediately under the liver. Bile is a solution secreted by the liver then excreted into the small intestine through the common bile duct . Bile facilitates the digestion and absorption of fat and cholesterol that passes into the intestine. In between meals, excess bile is stored in the gallbladder. In America, most stones are formed by the interaction of cholesterol and bile in the gall bladder.