Brazil nuts are known as a rich source of selenium. Selenium is vital for our health but consuming too much of it can be toxic. For adults, it’s recommended to ingest 50-70 micrograms of selenium on a daily basis, and one Brazil nut can contain 60 to 95 micrograms of selenium.

Eating 4 or 5 Brazil nuts will definitely pass the selenium threshold in adults and may lead to intoxication. The symptoms of a selenium overdose include memory difficulties, digestion problems, fatigue, and potential hair loss.