Several reviews and meta‐analyses of cytokines in GCF in otherwise healthy patients with periodontitis report that cytokines such as IL‐1α, IL‐1β, interleukin‐6 (IL‐6), GMCSF (granulocyte macrophage colony stimulating factor), interleukin‐12p40 (IL‐12p40), interleukin‐17 (IL‐17), TNF‐α, monocyte chemoattractant protein (MCP1/CCL2), matrix metalloproteases, bone remodeling products, prostaglandins, and macroglobulins are increased in periodontitis.4, 5, 6, 10, 11, 12, 13. Here, IL17A is linked to periodontitis.