5. Brazil nuts

With only one nut, you take your daily dose of selenium, and your body loves it. These little things are incredibly powerful, but make sure you don’t eat too many at once, or you’ll go from healthy to selenium overload very fast. This element is buttery, rich, and satisfying, but also incredibly potent. Pay attention to selenium overdose, as it can cause hair loss, stomach upset, and worse. In small doses, it’s a health hero, but yikes in big doses.