Green Gallnut (Quercus infectoria)
Green gallnut demonstrate astringent, antiinflammatory, local anesthetic, antipyretic, antiparkinsonian, antidiabetic, antitremorine, anti-aging, antioxidant, antimutagenic, anticaries, antibacterial, antiviral, antifungal, larvicidal, and antivenom effects. Green gallnut is strongly astringent due to their high tannin content. Tannins are water-soluble polyphenolic secondary metabolites in plants. Green gallnut occurs naturally and differ from most other natural phenolic compounds in their ability to precipitate proteins from solutions. The gallnut is used to arrest hemorrhage from the nose or gums and from hemorrhoids.
Green gallnut is also used for treatment of diarrhea, dysentery, and leukorrhea. The gallnut contains a large amount of tannin (gallotannin, 50-70%) and a small amount of free gallic acid and ellagic acid.
Green gallnut also demonstrated significant antibacterial activity against a broad range of bacteria, including clinical isolates.
Green gallnut (Quercus infectoria) of infectoria is used as dental powder in traditional medicine for the treatment of toothache and gingivitis.
The methanol extract of gallnut (Quercus infectoria) has an inhibitory activity on tyrosinase, which is a key enzyme in the synthesis of melanin and intervenes in several intermediate stages of pigment formation.
Ingested infusions of gallnuts or oak bark are very beneficial as an antidote to some poisonous substances with alkaloids, copper, and lead salts. Green gallnut, as a natural source with potential health-giving properties, hold promise for their use in human health in the future, as a food supplement, an antimicrobial agent, an antioxidant, for diabetic therapy, in the pharmaceutical and dermatology industries, as an ant pigment agent in the cosmetic industry.