Ceramides are a type of lipid, or fat molecule, found naturally in the skin. They play a crucial role in maintaining the skin's barrier function, helping to retain moisture and protect against environmental irritants. By keeping the skin hydrated, ceramides contribute to a healthy and youthful appearance. In skincare products, ceramides are often included to help restore the skin's natural barrier, especially for those with dry or sensitive skin. They can be found in creams, lotions, and serums, making them a popular ingredient for improving skin texture and overall health.