The bile duct only get wider because of dilation which is caused by and increase in pressure within the duct. This is caused by the gallbladder contracting. The bile duct is not an open tube it is held shut where it enter the duodenum by a muscle called the sphincter of oddi. If you can get the gallbladder to contract and the muscle to relax at the same time then bile will flow easily. Normally when we eat fatty food the gallbladder contracts for say 40 minutes and the muscle clamps hard around the end of the bile duct which causes the bile duct to be inflated. The muscle then relaxes and tightens rhythmically allowing squirts of bile to enter the duodenum in coordination with food entering from the stomach.
Dandelion root has been used for liver and bile complaints for centuries. The therapeutic properties of dandelion are due in part to its bitter substances taraxacin and inulin. The bitters stimulate the digestive glands and the liver and activate the flow of bile. Two studies, one dating back to 1938, have demonstrated that dandelion successfully treats hepatitis, liver swelling, jaundice and indigestion in those with inadequate bile secretion.
The most active component in Turmeric is curcumin and it is useful for treating liver and gallbladder problems, relieving liver damage, and for stimulating the production of bile. Curcumin has good antioxidant activity, comparing well with vitamin C. It is interesting to note that curcumin has good anti-inflammatory activity that is comparable to steroidal and non-steroidal drugs.
Ginger's nausea reducing actions have been attributed to its ability to increase digestive fluids, plus absorb and neutralize toxins and stomach acid. Ginger has been shown to increase bile secretion, as well as increase the action and tone of the bowels. Limited studies have suggested ginger may reduce morning sickness, as well as nausea after surgery. Ginger has a protective effect on the liver and the stomach, making this rhizome a good spice for people with liver or digestive problems. It is a helpful medicinal food for diabetics; ginger activates pancreatic and intestinal enzymes. Ginger also helps lower lipids, such as cholesterol and triglycerides, in the blood.
The artichoke also has anti-cholesterol and cholagogue Action. The choleretic, cholekinetic, diuretic and significant serum lipid lowering properties of artichoke have been substantiated in animal and clinical studies. Artichoke increases the rate of bile flow by 20 -40%. It is also very effective in eliminating dyspeptic symptoms, including pain, nausea, retching, meteorism (flatulent distension of the abdomen with gas in the alimentary canal).