Ethnobotanical, phytochemical and pharmacological aspects of Quercus species with special emphasis on Unani medicinal plant Quercus incana Roxb. (Baloot): An update

The genus Quercus comprises over 900 species distributed across temperate and subtropical zones, many of which hold a multitude of ecological, agricultural, industrial, and medicinal significance. Among them, Quercus incana Roxb., commonly referred to as Baloot in Unani medicine, is notable for its therapeutic applications. Traditionally, its bark and acorns have been employed for their astringent, haemostatic, and tonic effects. This review aims to consolidate classical Unani perspectives with contemporary phytochemical and pharmacological evidence on Q. incana , and to highlight its medicinal potential as well as avenues for future research. Data were compiled through the examination of classical Unani texts and a systematic search using “ Quercus incana ” “ Quercus incana Roxb.” “Baloot” “ Quercus AND phytochemistry” “ Quercus AND pharmacology” “ Quercus AND Unani” “oak AND tannins” “quercetin AND Quercus ” “ellagic acid AND Quercus ” as keywords in the electronic databases of PubMed, Scopus, ScienceDirect, and Google Scholar, covering literature published from the year of 2000 to 2025, The inclusion criteria encompassed ethnobotanical, phytochemical, and pharmacological studies on Quercus species, with a specific focus on Q. incana . Q. incana contains a wide spectrum of bioactive compounds, including tannins, flavonoids, phenolic acids, and triterpenoids. Other species of the Quercus genus have also been reported to produce constituents such as β-sitosterol, friedelin, quercetin, palmitic acid, terpenoids, coumarins, lignoceric acid, leucoanthocyanidins, and reducing sugars. These phytochemicals are associated with diverse biological activities, e.g., antimicrobial, antioxidant, anti-inflammatory, and wound-healing effects. Evidence from ethnobotanical surveys and pharmacological studies supports the traditional application of Baloot in the treatment of gastrointestinal, dermatological, and haemostatic disorders. Q. incana represents an important medicinal resource in Unani medicine with promising pharmacological activities. While existing data provide preliminary validation of its ethnomedicinal claims, further studies involving standardization of its active ingredients, bioassay-guided isolation, and clinical trials are necessary to establish its therapeutic value and facilitate its integration into evidence-based medicine.