C6 L-threo Ceramide (d18:1/6:0) is widely used in skincare and cosmetic formulations due to its ability to enhance the skin barrier function. It helps in retaining moisture, improving skin hydration, and reducing transepidermal water loss, making it effective in treating dry and sensitive skin conditions. Additionally, it plays a role in anti-aging products by promoting skin elasticity and reducing the appearance of fine lines and wrinkles. In research, it is utilized to study cellular processes, particularly in understanding apoptosis, cell signaling, and lipid metabolism. Its application extends to the development of therapeutic agents targeting diseases related to ceramide deficiency or imbalance.