Why does rapid weight loss = gallstones?

[WooHorn]

i heard that rapid weight loss can lead to an increased risk for developing gallstones. Not a problem for me, of course, but anyone know why?

 

[jmatt]

Dehydration maybe?

 

[NickDanger]

As the body metabolizes fat during rapid weight loss, it causes the liver to secrete extra cholesterol into bile, which can cause gallstones.