Propylene glycol is a popular humectant ingredient frequently incorporated in skincare products, particularly those tailored towards individuals with dry or sensitive skin. As a humectant, its primary role is to attract and retain moisture, thus keeping the skin hydrated and preventing transepidermal water loss TEWL. Moisture retention is especially significant for those with sensitive and dry skin types, as they often struggle with maintaining adequate hydration levels and skin barrier function.
Propylene glycol is a humectant, which means that it attracts and holds water. This makes it a beneficial ingredient for dry skin, as it can help to keep the skin hydrated. Propylene glycol is also a penetration enhancer, which means that it can help other ingredients in skin care products to penetrate the skin more easily.
Functions of propylene glycol:
- Hydration: As a humectant, propylene glycol draws moisture to the skin and helps to maintain skin hydration. This property makes it a valuable ingredient in moisturizers and other skincare products formulated for dry or sensitive skin.
- Skin barrier maintenance: By promoting hydration, propylene glycol helps to support the skin’s natural barrier function, preventing irritants and harmful substances from penetrating the skin.
- Product formulation: Propylene glycol is used as a solvent in skincare products due to its ability to dissolve and mix with various ingredients. This property helps to create stable and homogenous formulations.
- Enhancing product penetration: Propylene glycol can improve the penetration of active ingredients in skincare products, ensuring that they are absorbed effectively and provide optimal benefits.
Propylene glycol is a versatile ingredient that can be beneficial for a variety of skin types. It is a humectant that can help to keep the skin hydrated, and it is also a penetration enhancer that can help other ingredients in skin care products to penetrate the skin more easily. Propylene glycol is generally considered to be safe for most people to use, but it is important to note that it can be irritating to some people with sensitive skin.
Propylene glycol is rarely used in its pure form; rather, it is typically found as a component in the ingredient list of skincare and other beauty products.