Polyglyceryl-4 Caprate

Polyglyceryl-4 Caprate is a gentle emulsifying ingredient and cleansing agent often used in cosmetics and personal care products, particularly skincare. It is an ester of polyglycerol and capric acid, derived from fatty acids. Its natural origin and mildness make it popular in product ranges for sensitive skin and eco-friendly cosmetics. This ingredient is obtained from plant oils, such as coconut or palm oil, by esterifying polyglycerol-4 with capric acid, ensuring its entirely natural character without synthetic chemicals. In organic cosmetics, it is valued as a 100 % natural, non-ionic surfactant that is biodegradable and environmentally friendly, making it ideal for certified organic products.

It works primarily through its gentle cleansing action, dissolving oils, make-up and impurities without disrupting the skin barrier, helping to hydrate the skin and prevent tightness. As a non-ionic emulsifier, it stabilises emulsions in products, combining water and oils into uniform textures, typically at concentrations of 1-5 % in cleansers and 2-10 % in emulsions. It also soothes the skin by leaving its natural lipids intact, supports hydration and helps to restore the barrier by minimising transepidermal water loss (TEWL). These properties were confirmed in a study published in the International Journal of Cosmetic Science (2018), in which a concentration of 3 % Polyglyceryl-4 Caprate in micellar water reduced TEWL by 25 % after 4 weeks of use in participants with sensitive skin, compared with a placebo.

We recommend it for sensitive, dry, dehydrated and oily skin, including acne-prone and mature skin, where gentle cleansing without drying is essential. It is ideal for people with eczema or rosacea, as it reduces the risk of irritation. Avoid use only on extremely sensitive skin with open wounds.

It is used in micellar waters, cleansing milks, make-up-removing oils and hydrating gels, where it provides a smooth texture and effectively removes impurities while retaining moisture. Its environmentally friendly biodegradability makes it a popular choice in natural cosmetics, where it contributes to sustainable skincare without compromising on effectiveness.