Used as a nutritional supplement and research compound due to its potential antioxidant properties. It serves as a source of organic selenium in studies focusing on selenium metabolism and its role in preventing oxidative stress. Investigated for possible anticancer effects, particularly in relation to prostate and colon cancer, where it may induce apoptosis and inhibit tumor cell growth. Also employed in biochemical research to understand the mechanisms of selenoproteins and their impact on immune function and inflammation. Its structural similarity to cysteine allows incorporation into peptides, enabling the study of redox-active proteins.