Used as a synthetic phospholipid in liposome formulation for drug delivery systems, particularly in targeted cancer therapies and vaccine development. Its serine head group enhances membrane fluidity and promotes fusion with cell membranes, improving cellular uptake of encapsulated drugs. Commonly employed in research settings to study membrane dynamics and signal transduction pathways in model lipid bilayers. Also utilized in cosmetic formulations for its skin-moisturizing and barrier-repair properties due to its structural similarity to natural skin lipids.