GalanginGalangin is a flavonol, a type of flavonoid.OccurrenceGalangin is found in high concentrations in plants like Alpinia officinarum and Helichrysum aureonitens. It is also found in the rhizome of Alpinia galanga and in propolis.Biological activitiesGalangin has been shown to have in vitro antibacterial and antiviral activity. It also inhibits the growth of breast tumor cells in vitro.