D, l-selenomethionine Dl-selenomethionine Synonym semet Molecular formula c5h11no2se Molecular weight :196.11 Purity 99% hplc Appearance white to off-white powder Function 1.Increase sperm motility; 2.Enhance antioxidant capability and optimize immune system; 3.Anti-tumor and cancer prevention; 4.Combine with heavy metals such as hg, pb and as, and eliminate their potential danger to human health. Storage well sealed in cool and dry place Shelf life 24 months. 1g, 10g, 50g, 100g, 500g, 1 kg