Selenium ACE+D contains an organic-form of selenium yeast which is up to two times better absorbed by the body compared to non-organic Selenium. Selenium and Vitamins A,C & D are essential nutrients needed by the body to help support a healthy immune system. Selenium and Vitamins C & E all contribute to the protection of cells from Oxidative Stress. Taking Selenium-ACE+D one-a-day tablets as part of a healthy lifestyle helps ensure dietary intake of these important nutrients which are needed by the body for general well-being.