Macadamia nuts are high in healthy fats and may help those trying to lose weight. One serving of macadamia nuts also contains dietary fiber protein manganese thiamin and a good amount of copper. Brazil nuts have a high proportion of monounsaturated fat which is a good fat but they also contain some protein as well as being a good source of important nutrients including magnesium zinc calcium vitamin E and some B vitamins.They are very High in Selenium Contents.