There is a current post about gallstones, and a few people mentioned that weight loss can cause the formations of gallstones. I thought this might be helpful because I lost 80lbs, and had to have my gallbladder removed. Also, doctors commonly remove the gallbladder during gastric bypass just as a precaution.
http://www.ucdmc.ucdavis.edu/health/...oc10risks.html
"Weight Cycling. Rapid weight loss or cycling (dieting and then putting back weight) further increases cholesterol production in the liver, with resulting supersaturation and risk for gallstones. A 2000 study suggested the following rates for gallstones related to extreme and rapid weight loss:
The risk for gallstones as high as 12% after eight to 16 weeks of restricted calorie diets.
The risk is more than 30% within a year to 18 months after gastric by-pass surgery.
About one-third of gallstone cases in these situations are symptomatic. The risk for gallstones are highest in the following dieters:
Those who lost more than 24% of their initial body weight.
Those who lose more than 1.5 kg (3.3. lb.) a week.
Those on very low-fat, low-calorie diets.
Weight cycling also puts people at risk for gallstones. For example, a 16-year study found that the risk for gallstone surgery was 68% higher for women who lost and then regained more than 20 pounds at least once than in women whose weight remained stable. "