Contributes to the normal functioning of the immune system and thyroid and also contributes to the protection of body ccells from oxidative stress.  Cardiovascular, reproductive, immune health.Selenium also promotes normal sperm motility. Government estimates place the average selenium intake for the UK population to be approximately 50% of the official recommended daily intake. SelenoPrecise contains 200μg of organic selenium with a bio-availability of 89% - the highest ever measured to date.