My Husband Had His Gallbladder Removed Three Weeks Ago, He

My husband had his gallbladder removed three weeks ago, he still has minor pain where they inserted the drain bag but it's slowly healing. He went in this week to have blood tests done and the doctor says his enzymes are still a little for his pancreas and his liver. He isn't throwing up, his bowel movements are normal although, his urine is a little dark. We're waiting for a return phone call to see what the doctor wants to do, but in the meantime what can WE do to help promote healthy liver and pancreas, and hopefully restore it?
His procedures were : ERCP to remove stones from his common bile duct and the second was removal of his gallbladder. He's 47 years old. Any advice is greatly appreciated! Thanks so much! -Amber