Skin Care Moisturizers.

The article focuses on the ingredients of skin moisturizers. It states that humectants including pyrrolidone carboxylic acid (PCA), glycerin, and urea can modulate skin moisture as well as provide good water-binding capacity while maintaining good skin substantivity. It says that emollient is often related to the substances that could plasticize, soften, and smoothen skin because it fills the void spaces on the skin surface.