The lack of rain in South America due to El Niño also caused the pods of Brazil's walnut to fall soon, causing fewer seeds to germinate and become trees. In addition, due to the decline in Brazilian nut production in recent years, the felling of a Brazilian nut tree in Brazil has been banned. Brazil nuts are harvested from the Brazilian nut tree that grows only in specific locations in the Amazon rainforest in the main producing regions of Bolivia, Brazil and Peru. From January to March, collectors harvest walnuts from Brazil during the wet season (January-March), when most of the tree fruits fall to the forest floor.
Brazil nuts are inexhaustible sources of nutrition and provide healthy fats, antioxidants, vitamins and minerals. Eating Brazil nuts can reduce inflammation, support brain function, and improve thyroid function and heart health. There is no established and agreed shelf life for Brazil nuts, and everyone's opinion on them is slightly different. Brazil nuts, for example, contain very high amounts of selenium (68—91 mcg per nut) and can cause you to exceed the upper limit if you eat too much.
Like bananas, Brazil nuts contain potassium, but they also contain a small amount of radium that is absorbed from the soil in which they are grown. Brazil nut (Bertholletia excelsa), also called Pará nut, the edible seed of a large South American tree (Lecythidaceae family) found in the Amazonian forests of Brazil, Peru, Colombia and Ecuador. After the “catastrophic harvest” in the Amazon jungle, there has been a drastic reduction in Brazil's nut supplies. Importers are not willing to incur the costs of these tests or of the subsequent destruction of the affected nuts, so walnuts in shells no longer matter.