Obviously, nobody has been able to go back to 1930, get all the people born in one maternity unit, and half of them eat lots of fruit and veg and olive oil, half of them eat McDonald's, and then we see how many wrinkles you've got later.
reunir todas as pessoas nascidas numa determinada maternidade, pôr metade a comer fruta, vegetais e azeite, e outra metade a comer no McDonald's, e depois ver quantas rugas terão mais tarde.