Brazil nuts are large, nutrient-dense nuts that come from the Brazil nut tree (Bertholletia excelsa) native to the Amazon rainforest in South America. The nuts are encased in a hard, woody shell that must be cracked open to reveal the creamy white flesh inside. Brazil nuts are a good source of protein, fiber, healthy fats, and important minerals such as selenium, magnesium, and zinc. They are also high in antioxidants and have been linked to several health benefits, including improved heart health, reduced inflammation, and enhanced brain function. Due to their high selenium content, Brazil nuts should be consumed in moderation to avoid overconsumption of this mineral, which can have adverse effects. It's generally recommended to eat no more than one to two Brazil nuts per day to reap their health benefits without overdoing it.

Hazelnut, also known as filbert, is a type of nut that grows on the hazel tree. It is widely cultivated in Turkey, Italy, Spain, and the United States. Hazelnuts are rich in nutrients such as protein, healthy fats, vitamins, and minerals. They are a good source of antioxidants and have been linked to several health benefits such as improved heart health, lower blood sugar levels, and reduced inflammation. Hazelnuts are commonly used in baking, confectionery, and as an ingredient in spreads such as Nutella. They can be eaten raw, roasted, or ground into a paste or butter.