> The healthy superfood shockingly linked to cancer that could be in your pantry right now

One essential mineral in Brazil nuts, selenium, is believed to boost the immune system and support thyroid function, but too much of it could actually have the opposite effect and be harmful to your health. 

https://www.dailymail.co.uk/health/article-14623503/common-healthy-superfood-cancer-link-surge-rates.html