What it is: Barley tea, or boricha, as Koreans call it, is made by adding roasted barley to water and bringing it to a boil.

Skin perks: Barley tea contains a large number of antioxidants. One study found that these antioxidants were effective in preventing the formation of peroxynitrite, an oxidant that attacks skin tissue and creates DNA damage — a major culprit of wrinkles. Bonus: Another study found that barley tea prevents tooth decay by preventing bacterial colonization — think of it as a hot, bacteria-killing mouthwash that is A-OK to swallow.

How to eat it: Koreans generally have barley tea available for every meal — it's often already on the table at restaurants. Depending on the time of year, it's served hot or cold.

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