C18 L-threo Ceramide (d18:1/18:0) is widely used in cosmetic and skincare formulations due to its ability to enhance skin barrier function. It helps retain moisture, improving skin hydration and reducing dryness. This ceramide is also incorporated in anti-aging products to restore the skin’s natural lipid balance, reducing the appearance of fine lines and wrinkles. In dermatological research, it is studied for its role in repairing damaged skin and addressing conditions like eczema and psoriasis. Additionally, it is utilized in hair care products to strengthen hair strands and prevent breakage. Its application extends to pharmaceutical formulations for targeted drug delivery systems, leveraging its biocompatibility and lipid-based structure.