Camellia sinensis leaves, another name for green tea, can have positive effects on periodontitis treatment by reducing bleeding, gingival, plaque, clinical attachment, pocket depth indices, inflammation, alveolar bone loss, and osteoclastic function and increasing total antioxidant capacity (TAOC) and glutathione-S-transferase (GST) (de Almeida et al., 2019 ▶; Hrishi et al., 2016 ▶; Taleghani et al., 2018 ▶). This evidence concerns the gene HPGDS and periodontitis.