The tea soup has changed color? Is it because the tea leaves are not good?
A tea friend noticed that tea soup turns darker after sitting overnight. This color change occurs because polyphenols in the tea are oxidized by oxygen in the water and air, forming darker pigments. Lighter-colored teas show this change more obviously than darker teas like black tea or ripe Pu-erh....
Tea News · Sep 03, 2025
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