Selenium

Selenium is a mineral. Although toxic in large amounts, trace amounts of selenium are necessary for cellular function in many organisms, including all animals. Selenium is an ingredient in many multivitamins and other dietary supplements.

Evidence
In mice, selenium deficiency resulted in more severe damage following Coxsackie B3 infection than in selenium-adequate mice.

Learn more

 * Linus Pauling Institute Micronutrient Information Center - Selenium