L-Lysine 1000 mg Tablets, 90 ct, QC99909 quality-choice-products Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. L-Lysine is crucial for collagen synthesis, which allows for healthy skin, tendons, ligaments, and bones to thrive. Contains essential amino acid that is necessary for protein production. Gluten Free