One is that the Hispanics who tend to emigrate to america tend to be more healthy, which is known as the ‘healthy migrant effect,’ and the ones who are less healthful tend to return home, which is called the ‘salmon bias effect.’ But another explanation could be that cultural factors, such as ‘family structure, way of life behaviors and social systems’ may be playing a role by ‘conferring a protective barrier against the vicissitudes of minority position and low socioeconomic conditions’ . Related StoriesStudy evaluates efficiency of antiretroviral treatment in HIV-infected childrenRutgers College of Nursing takes business lead in $6 million nationwide effort to avoid fresh HIV infectionsBrown University experts describe new solution to test HIV mutationsNPR’s Shots blog page: The longevity advantage appears strongest among old Mexican men, previous analysis indicates.Many plants, however, produce antioxidant substances to safeguard their own cells from injury, and we consume many of these antioxidants in the foods that we eat. Numerous research indicate that some of these same antioxidants could also be used to preserve food. For example, a 2006 research by researchers from the University of Extremadura in Spain found that essential natural oils of rosemary and sage had been actually more effective at preventing meats spoilage than either BHA or BHT. Another scholarly study, conducted by Portuguese experts and released in the journal Innovative Food Science and Emerging Systems in 2008, found that olive and grape extracts were also far better preservatives than pure chemical substance antioxidants.