The addition of thymol to PLA matrices resulted in slight modifications of tensile properties. Elastic modulus decreased around 15%from the original values for neat PLA for those materials containing thymol. This modification could be explained, again, by the plasticizing effect caused by thymol. This result confirmed the observed decrease in Tg values already reported. Similar results have been reported for PLA and low-density polyethylene (LDPE) formulations with active compounds, such as resveratrol, carvacrol or atocopherol