Shaaha polyphenols waa erey guud oo loogu talagalay walxaha polyphenolic ee caleemaha shaaha, kuwaas oo ah budo amorphous ah oo si fudud biyaha ugu milmaya, ku milma ethanol, methanol, acetone, iyo ethyl acetate, oo aan lagu milmin chloroform. Maaddada polyphenols shaaha ee shaaha cagaaran waa mid aad u sarreeya, oo xisaabiya 15% ilaa 30% cufkiisa. Qaybaha ugu muhiimsan ee polyphenols shaaha waa flavonoids, anthocyanins, flavonols, anthocyanins, phenolic acids, iyo phenolic acids. Kuwaas waxaa ka mid ah, flavanones (inta badan catechins) ayaa ah kuwa ugu muhiimsan, oo xisaabiya 60% ilaa 80% wadarta guud ee polyphenols shaaha, oo ay ku xigto flavonoids, iyo walxaha kale ee phenolic ayaa leh wax yar.