Is there any proof that apple cider vinegar is an effective pain relief for galbladder attacks or stones?

Why would you think so: Apple cider vinegar when consumed in large amounts may lower potassium levels, promote osteoporosis, raise renin levels, alter insulin levels, & even burn your esophagus. Apple cider vinegar tablets are not well regulated, may vary dramatically in terms of vinegar content from brand to brand, & lack evidence of efficacy. If you have a gallbladder problem, see your doctor for appropriate treatment.