we also have Brazil nuts from : UkBecause of the resulting rich taste, Brazil nuts can often substitute for macadamia nuts or even coconut in recipes. Also due to their high polyunsaturated fat content, primarily omega-6, shelled Brazil nuts soon become rancid.Nutritionally, Brazil nuts are a good source of magnesium and thiamine[citation needed], and are perhaps the richest dietary source of selenium; one ounce can contain as much as 10 times the adult USRDA