Nuts are seen as a healthy snack, but even a small helping size is packed with calories and cholesterol. In fact, certain nuts have demonstrated links to elevated colon cancer risks.

Add Yahoo as a preferred source to see more of our stories on Google. Selenium is found in trace amounts in living organisms, soil and plants. Nazarii Neshcherenskyi/iStock via Getty Images Plus ...

(THE CONVERSATION) Selenium is a nutrient that plays a crucial role in human health, contributing to the thyroid and immune function, DNA repair, and cardiovascular and cognitive health. "Maybe they ...