Viruşii gripali suferă uşor mutaţii, răspândindu-se în fiecare an în întreaga lume. Oamenii de ştiinţă niponi consideră că ceaiul verde ajută la combaterea infecţiilor sezoniere obişnuite, precum şi a noilor forme de gripă.
Catechinul, principalul polifenol din ceaiul verde, joacă un rol important în prevenirea infecţiilor gripale. Printre alte tipuri de polifenoli, catechinul EGCG are cea mai puternică acţiune antivirală. Indiferent de subtipurile virale, EGCG şi-a dovedit proprietăţile de protecţie şi împotriva noului tip de virus A/H1N1, susţin oamenii de ştiinţă japonezi.
Cercetătorii de la Universitatea Shizuoka au realizat un experiment în cadrul căruia au amestecat trei tipuri de virusuri gripali, inclusiv A/H1N1 cu Galat Epigallocatechin extras din ceaiul verde. Amestecul a fost introdus într-o cultură de celule în scopul infestării acesteia.
Apoi, savanţii au numărat celulele infectate. S-a dovedit că şi în concentraţii scăzute, EGCG împiedică acţiunea gripei asupra celulelor. Ba chiar într-un grad mai înalt decât amantadina, destinată între altele şi pentru profilaxia şi tratatea stărilor gripale.
Medicii japonezi susţin că atât în formă pură, cât şi sub forma de extract medical, băutura tradiţională orientală poate fi remediul cel mai bun împotriva gripei porcine. În topul celor mai folositoare produse pentru om, realizat recent de revista americană Forbes, ceaiul verde se situează pe locul 11, înaintea cepei şi usturoiului.
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