Tea polyphenols kalma ce ta gaba?aya don abubuwan polyphenolic a cikin ganyen shayi, wa?anda fari ne amorphous foda wa?anda ke da sau?in narkewa a cikin ruwa, mai narkewa a cikin ethanol, methanol, acetone, da ethyl acetate, da rashin narkewa a cikin chloroform. Abubuwan da ke cikin shayi na polyphenols a cikin koren shayi yana da inganci, yana lissafin 15% zuwa 30% na yawan sa. Babban abubuwan da ke cikin shayi polyphenols sune flavonoids, anthocyanins, flavonols, anthocyanins, phenolic acid, da phenolic acid. Daga cikin su, flavanones (yafi catechins) sune mafi mahimmanci, suna lissafin kashi 60% zuwa 80% na jimlar polyphenols na shayi, sannan flavonoids, da sauran abubuwan phenolic suna da ?arancin abun ciki.