(Sodium Pyrrolidone Carboxylate=Na PCA) is a natural humectant derived from L-Glutamic acid. Known to be abundant in human skin as a component of NMF (Natural Moisturizing Factor), this humectant helps keep skin and hair fresh-looking. This product has a good moisturizing property. Hair care products, such a shampoos or conditioners, with Na PCA improve hair manageability with a reducdtion of hair-fly. Na PCA is a very effective moisturizer for the skin and prevents the shrinkage of the skin even at low humidity. Because Na PCA has excellent moisturizing effects and safety to skin and eye mucosa, this product is especially useful as a humectants for cosmetics and toiletries.