This review examines the antioxidant activity of essential oils (EOs) from Pinaceae species, which include conifers such as Pinus, Picea, Abies, and Cedrus. The study highlights the variability in antioxidant effects among different genera, species, and plant parts, as well as the limitations of current methods for assessing antioxidant activity. The review discusses various antioxidant assays, including DPPH, ABTS, FRAP, and TBARS, and their application in evaluating the antioxidant properties of EOs. It also addresses the challenges in comparing results across studies due to differences in experimental conditions, measurement techniques, and reference substances. The study emphasizes the importance of using standardized methods and reference compounds to ensure consistency in antioxidant assessments. The results show that EOs from different Pinaceae species exhibit varying degrees of antioxidant activity, with some showing higher potency than ascorbic acid. The review concludes that further research is needed to better understand the antioxidant properties of Pinaceae EOs and to develop more reliable methods for their evaluation.This review examines the antioxidant activity of essential oils (EOs) from Pinaceae species, which include conifers such as Pinus, Picea, Abies, and Cedrus. The study highlights the variability in antioxidant effects among different genera, species, and plant parts, as well as the limitations of current methods for assessing antioxidant activity. The review discusses various antioxidant assays, including DPPH, ABTS, FRAP, and TBARS, and their application in evaluating the antioxidant properties of EOs. It also addresses the challenges in comparing results across studies due to differences in experimental conditions, measurement techniques, and reference substances. The study emphasizes the importance of using standardized methods and reference compounds to ensure consistency in antioxidant assessments. The results show that EOs from different Pinaceae species exhibit varying degrees of antioxidant activity, with some showing higher potency than ascorbic acid. The review concludes that further research is needed to better understand the antioxidant properties of Pinaceae EOs and to develop more reliable methods for their evaluation.