improve sleep quality; contains flavones,xi an ess ential for human body;tannic acid free that not ... 35% Tengcha flavones cinsisting of Myticennntin, Dihydromyricetin, Xi,Fe,K, Zn,Ca,Cu,Mg AND other ... water Storage aled in cool and dry place for two years Comparison with other teas Vine Tea ... or caffernethat lead to insomnia Contains flavines, Xi and ess ential trace elements forhiman body Mainly ...