BARLEY DRINK ENRICHED WITH ZINC AND SELENIUM. Barley grains are used to create a revolutionary drink in a cup with zinc and selenium, which contribute towards normal immune system activity. The immune system protects us every day against infections and the aggressions of harmful substances in the environment. Several factors contribute towards compromising our immune system, making it more susceptible to external agents. Chronic stress, lack of physical exercise, lack of sleep, smoking, malnourishment are all enemies of our immune system.