Polyolefin compositions

A polyolefin composition is provided that has an improved impact strength. Additionally, a process of using dibenzylidene sorbitol to improve the impact strength of a polyolefin is provided. Said polyolefin composition comprises: (a) a polyolefin that comprises ethylene, wherein said polyolefin has a melt index from about 3 to about 10 grams per ten minutes and a density greater than 0.938 grams per cubic centimeter and wherein said polyolefin that comprises ethylene is a homopolymer or a copolymer, where said copolymer comprises ethylene as the major component, as measured by mole percent, of said copolymer; and (b) dibenzylidene sorbitol, in an amount equal to, or greater than, the amount required to increase the notch izod impact strength of a composition that consists essentially of said polyolefin and said dibenzylidene sorbitol, by greater than 10 percent over the notched izod impact strength of a composition that consists essentially of said polyolefin.