Endemic Sideritis dichotoma Huter, herbal tea, is used for colds, coughs and digestive ailments. Since at least 25% of the active ingredients of pharmacological drugs are obtained from plants, it is important to investigate many plants, both traditionally used and whose potential hasnt yet been discovered, before they disappear. When the results compared to other Sideritis species, it has better antioxidant activity in DPPH• scavenging activity, Fe3+ and Cu2+ reducing capacity methods and is also rich in minerals, necessary for human body, K, Mg, Ca, P, S. Zone values (10‐19,5 mm) obtained on S. aureus, P. aeruginosa, E. coli, S.enteritidis, E. faecalis, P. putida and K. pnemoniae strains are an indication that the plant has antibacterial activity. 27 secondary metabolites were identified by LC‐HRMS. Verbascoside, pharmacologically active compound known to have antitumor effect, cytotoxic selectivity and anticancer activity, is the most abundant phenolic in ethanol extract (49297.13 mg/kg).