Contrary to popular belief, a film on the surface of tea is not a sign of its low quality.
Swiss scientists came to this conclusion.
The results of their study were published in the scientific journal EurekAlert, reports the Zen channel Men Today.
Why does tea have a film on it?
Scientists from Zurich have found that the film on tea appears due to hard water.
They also found that this film has a positive effect on the taste of the drink.
Namely, it removes bitterness. That is why scientists recommend using hard water for brewing tea.
If you brew it in the softest water possible, the drink will be bitter due to the lack of a film, the authors of the study claim.
