text: A 2018 paper in Science showed how components of this substance increase the expression of CXCL16, boosting the production of natural killer cells.
full_question: A 2018 paper in Science showed how components of this substance increase the expression of CXCL16, boosting the production of natural killer cells. Colesevelam increases the rate of excretion of this substance. Sequestrants of this substance’s acids may be used to lower LDL cholesterol levels. Several cholic acids are found in namesake salts in this substance, which aids in the breakdown of lipids after it is discharged from the gallbladder. For 10 points, name this brownish-yellow substance produced by the liver.
first_sentence: A 2018 paper in Science showed how components of this substance increase the expression of CXCL16, boosting the production of natural killer cells.