IMMUNE SYSTEM, THYROID, HEART & METABOLISM SUPPORT - Selenium naturally supports immune system, healthy thyroid, prostate & heart function. Selenium may also play a key role in metabolism in both men and women. ESSENTIAL MICRONUTRIENT SELENIUM AMINO ACID COMPLEX- Selenium is a natural micronutrient that may play a vital role in many essential body functions. SUPERIOR QUALITY: Laboratory tested. All Bronson products are tested in our state-of-the-art cGMP registered facility in New York. TRUSTED SINCE 1960: The pioneers of Bronson Vitamins were a group of pharmacists who witnessed the benefits of vitamins and mineral supplementation firsthand with their patients. Bronson Vitamins have been consistently mentioned by top medical professionals since our inception in 1960. WORKS OR YOUR MONEY BACK: We back our products up with a 365-day hassle-free money back guarantee. There's no risk when you order now!