Sodium PCA is a natural hydrating agent derived from oils, plants, and fruits, and is the sodium salt version of pyrrolidone carboxylic acid (PCA), also known as pyroglutamic acid. It is a humectant that naturally occurs in the skin and is used in a variety of skincare and haircare products. It can effectively enter the topmost layer of the skin and pass the benefits to the inner layers, notably reducing dryness. Sodium PCA also helps in preventing moisture loss, reducing the risk of bacteria and allergen attack, and treating conditions like eczema. It is considered safe for use in cosmetics and personal care products and is suitable for all skin types except those with identified allergies to it
. Sodium PCA is often used in products such as facial moisturizers, shampoos, conditioners, serums, and facial cleansers
. It is known for its moisturizing and humectant properties, being twice as effective as glycerin and less effective than hyaluronic acid in retaining water
