O substanta din compozitia vinului rosu, resveratrol, are efecte miraculoase in cazul persoanelor obeze, e concluzia unui studiu realizat in Statele Unite. In plus, testele efectuate in laborator, pe cobai, au aratat ca resveratrolul creste foarte mult speranta de viata.
Resveratrolul e un polifenol ce se gaseste din abundenta in struguri, fructe de padure si alune. E prezent intr-o cantitate de 50 pana la 100 de miligrame in fiecare gram de pielita de strugure, mai mult decat dublu fata de concentratia existenta in alte fructe. Vinul rosu, care fermenteaza mai mult timp impreuna cu pielita si coditele boabelor de strugure, contine o cantitate ridicata de resveratrol. Aceasta molecula ar putea explica de ce francezii (care consuma mult vin rosu) sufera de mai putine maladii cardiovasculare, in ciuda alimentatiei bogate in calorii.
Teste anterioare au demonstrat efectul benefic al acestei molecule asupra viermilor si musculitelor. Însa acest studiu pe cobai este primul care demonstreaza ca resveratrolul are efecte asupra mamiferelor, sustin cercetatorii de la scoala de medicina a Universitatii Harvard (HMS), Massachussetts, si de la Institutul national american de studii gerontologice (NIA).
“Este pentru prima data cand se demonstreaza ca aceasta molecula are efecte pozitive asupra prelungirii vietii mamiferelor, a declarat David Sinclair, coordonator al acestui studiu. “Cobaii au o structura mai apropiata de a oamenilor decat celelalte organisme cercetate pana acum, ceea ce ne da speranta ca resveratrolul poate actiona in mod similar asupra oamenilor fara efecte secundare nefaste”, a adaugat cercetatorul.
“Dupa sase luni, resveratrolul a impiedicat toate evolutiile negative ale unui regim alimentar foarte bogat in calorii asupra organismului”, a subliniat Rafael de Cabo, coautor al acestui studiu. Cobaii obezi nu au dezvoltat diabet si si-au mentinut sanatatea ficatului si a sistemului cardiovascular.
Ajuta si in lupta cu melanomul
Alte teste recente au demonstrat ca resveratrolul poate reduce dezvoltarea melanomului, poate distruge cancerul de san si poate reduce nivelul colesterolului.
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