Which bile components contributes to digestion?

Bile salts.

Explanation:

Bile salts known as steriod acid are essentially made of bile acids that are joined in pairs with glycine or taurine. They are primarily produced in the liver, directly from cholesterol. They are an essential component of bile that digest dietary fats in the small intestine.

geologic time scale (for gradpoint) =)

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.