Excellent Source of Selenium Good Source of Magnesium No Added Oils Native to the Amazonian rain forests of South America, Brazil nuts are one of the richest known food sources of selenium, an important dietary mineral. They're also a good source of magnesium. NOW Real Food® Brazil Nuts have a uniquely rich, appealing flavor, which are often used as a substitute for macadamia nuts or even coconut in some recipes. Mix them with other nuts for a nutrient-dense and incredibly delicious snack. Watch our Food Trends and Hot Products webinar. NOW Real Food® Brazil Nuts have a uniquely rich, appealing flavor, which are often used as a substitute for macadamia nuts or even coconut in some recipes. Mix them with other nuts for a nutrient-dense and incredibly delicious snack. Refrigeration recommended after opening.