Do Bile Acid Sequestrants Help In Treating Gallbladder Stones?

my husband has gall stones and is refusing surgery. He is on a low fat diet and usually can go for 2-3 weeks without problems, but he needs to loose about 80 lbs. Would a bile sequestrant help the stones dissolve or help with weight loss? What about turmeric? I ve read it can help prevent stones, but can also cause painful g.b. contractions if you already have stones. He is very inactive due to knee pain, but he could use a Nordic tract which is easy on his knees. His bone structure is too large for a knee replacement, not a candidate. He has done a lot of juice fasting, but never does it long enough to get into ketosis to loose weight. Any suggestions? Thank you in advance