What does a gallbladder do? Is it OK to take it out?

What does a gallbladder do? Is it OK to take it out?: "Since bile is actually produced by the liver, it's possible to survive without a gallbladder, but not without unpleasant digestive tract complications. Some patients suffer from dumping syndrome, in which food is 'dumped' too quickly into the intestines from the stomach. "
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More people suffer this side effect than most doctors let on.