Shepherd’s Tea, Olympus tea, or interchangeably, Greek mountain tea is a popular natural uncaffeinated beverage from Eastern Europe, derived from Sideritis scardica (ironwort), a hardy perennial known for its ability to thrive at high altitudes.

The word "Sideritis" can be translated from Greek as "he who is or possesses iron."

As with many traditional products attributed "healing" properties—in this case, chiefly affecting the respiratory system, digestion, and inflammation—modern evidence supports the curative myths of Greek mountain tea.

Reference:

– Herba Sideritis: A putative adaptogen for reducing the risk of age-related cognitive decline and neurodegenerative disorders

– The Acute and Chronic Cognitive and Cerebral Blood Flow Effects of a Sideritis scardica (Greek Mountain Tea) Extract: A Double Blind, Randomized, Placebo Controlled, Parallel Groups Study in Healthy Humans