Abstract: A method of reducing the odor of a resin that includes the step of adding about 0.1% to about 10% by weight of an absorbent clay to the resin. A resin composition with low odor is provided that includes 60% to 99.9% of a styrenic polymer; optionally 0.1% to 30% of one or more elastomeric polymers; and 0.1% to 10% of an absorbent clay. The styrenic polymer is formed by polymerizing a mixture containing 35% to 100% by weight of one or more styrenic monomers, optionally 1% to 49% by weight of one or more maleate-type monomers, and optionally 1% to 65% by weight of one or more other polymerizable monomers. The resin composition and/or method can be used to make molded articles or a resin foam.