In tarile asiatice, ceaiul verde este consumat precum cafeaua la noi, si asta pentru ca e bogat in polifenoli, o clasa de substante fito-chimice cu o putere antioxidanta de 100 de ori mai mare decat a vitaminei C. Experimentele din laborator arata ca mai multi polifenoli din ceaiul verde, numiti catecine, pot inhiba cresterea unor noi vase de sange, ceea ce duce la prevenirea cancerului prin privarea tumorilor incipiente de hrana. Studiile din China leaga consumul zilnic de ceai verde de un risc scazut de cancer la stomac, esofag si ficat. Iar studiile din Japonia arata ca zece cesti de ceai verde pe zi reduc riscul bolilor de inima. Daca pare greu de inghitit atata ceai, folositi-l drept apa de gura; plimband ceaiul prin gura indepartati bacteriile care cauzeaza cariile. In plus, dupa ce a fost aplicat pe pielea cobailor din laborator, s-a ajuns la concluzia ca reduce si aparitia cancerului de piele.
Cum ramane insa cu ceaiul negru? Facut din aceleasi frunze ca si cel verde, dar procesat diferit, ceaiul negru poate fi la fel de eficient, cred oamenii de stiinta.
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