Simmer in 2L water for 15 minutes.
Let drink cool a little before filtering.
Stir in honey (to taste). If using rock sugar, add when boiling.
Refrigerate if desire cold drink. Otherwise, drink it warm.
Kills cancer cells or not, this drink is very nice and refreshing! I tried once after a spa session and i got hooked. It was also good for clearing the nose during when you have a cold