La începutul fiecărui sezon estival, medicii avertizează că expunerea excesivă la soare poate duce la apariţia cancerului de piele. Plecând de la această problemă, profesorul Paul Nghiem, de la Universitatea de dermatologie Washington, din Seattle, a realizat un studiu pentru a afla cum poate fi prevenită apariţia acestei boli. Astfel, el a descoperit că produsele care conţin cafeină nu numai că blochează procesul de înmulţire a celulelor canceroase, dar le şi distruge pe cele deja afectate de razele ultraviolete.
În urma acestui studiu, s-a ajuns la concluzia că un consum regulat de produse cu cafeină scade riscul de a face cancer de piele. În afară de boabele de cafea, cafeina se mai regăseşte şi în frunzele de ceai, în boabele de cacao şi nucile de cola. Dintre acestea, cafeaua şi ceaiul sunt cele mai indicate, susţin specialiştii, care recomandă a se consuma zilnic o ceaşcă de cafea sau o cană medie de ceai.
Spray-ul cu extract de ceai verde are acelaşi efect
O echipă de cercetători americani din Ohio a realizat un spray din extract de ceai verde, care, ca şi cafeina, protejează pielea împotriva cancerului de piele. Acest lucru a fost descoperit după ce s-a pulverizat această loţiune pe o mică porţiune de pe epiderma a zece voluntari, care au fost expuşi ulterior razelor ultraviolete. Partea respectivă a rezistat mai bine în faţa arsurilor solare, care conduc la cancerul de piele.
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