Triglycerides are composed of two types of molecules, i.e., glycerol (3 carbon molecules) and
fatty acids which is attach to the glycerol at the alcohol Unit. The following is a structural representation of a triglyceride at the molecular level.
Fatty acids are chains of hydrocarbons composed 4-22 (or more) carbons along with a carboxyl group at one end. If each carbon has two hydrogen atoms, the fatty acid is saturated. If two carbon atoms are double-bonded, so, that there is less hydrogen in the fatty acid, it is unsaturated (monounsaturated). If more than two carbon atoms are unsaturated, the fatty acid is polyunsaturated.