Israeli paradox
The Israeli paradox was an apparently paradoxical epidemiological observation that Israeli Jews have a relatively high incidence of coronary heart disease (CHD), despite having a diet relatively low in saturated fats, in apparent contradiction to the widely held belief that the high consumption of such fats is a risk factor for CHD. The paradox was that if the thesis linking saturated fats to CHD is valid, the Israelis ought to have a lower rate of CHD than comparable countries where the per capita consumption of such fats is higher. Since 1996 when observations were published CHD rates in Israel (which were even at the time lower than USA or France) have significantly fallen.