Article last updated: October 15, 2024
PEG-15 Phytosterol, also known as (3-.beta.)-Sigmast-5-en-3-ol, ethoxylated (15 mol EO average molar ratio), is a cosmetic ingredient primarily used for its emulsifying properties. Derived from plant sterols, which are naturally occurring compounds found in the cell membranes of plants, PEG-15 Phytosterol is part of a broader category of ingredients known as polyethylene glycols (PEGs). These compounds are often used in cosmetics to help blend oil and water-based ingredients, creating a stable and homogenous mixture.
The history of PEG-15 Phytosterol in cosmetics dates back to the increasing demand for more effective and stable emulsifiers. As the cosmetic industry evolved, the need for ingredients that could improve the texture and longevity of products became paramount. PEG-15 Phytosterol emerged as a solution due to its ability to enhance the consistency and performance of various formulations, from creams and lotions to serums and cleansers.
The production of PEG-15 Phytosterol involves a process called ethoxylation, where ethylene oxide is added to phytosterol. This chemical reaction results in the formation of a compound with an average of 15 ethylene oxide units per molecule, hence the “15” in its name. This modification enhances the solubility and emulsifying capabilities of the phytosterol, making it more effective in cosmetic formulations. The end product is a versatile ingredient that helps to stabilize and improve the texture of cosmetic products, ensuring a smooth and pleasant application experience for the user.
In this section, we will delve into the officially recognized cosmetic benefits and uses of PEG-15 Phytosterol:
PEG-15 Phytosterol is primarily used as an emulsifying agent in cosmetic formulations. This means it helps to blend ingredients that typically don’t mix well together, such as oil and water. By stabilizing these mixtures, it ensures that the product maintains a consistent texture and efficacy throughout its shelf life. This is particularly important in products like lotions, creams, and serums, where a smooth and uniform application is crucial for user experience.
Note: the listed benefits above are exclusively based on the officially recognized and defined functions of the ingredient, as documented by the International Nomenclature of Cosmetic Ingredients (INCI).
PEG-15 Phytosterol is generally considered safe for use in cosmetic products. However, as with any ingredient, there are potential side effects that users should be aware of:
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of PEG-15 Phytosterol during pregnancy and breastfeeding are lacking. Therefore, it is advisable for these individuals to consult a healthcare professional for further advice before using products containing this ingredient.
Adverse reactions to PEG-15 Phytosterol are relatively uncommon, but they can occur. To minimize the risk of an adverse reaction, it is recommended to perform a patch test before widespread usage.
In terms of comedogenicity, PEG-15 Phytosterol is rated at 1 on a scale of 0 to 5, where 0 is totally non-comedogenic and 5 is highly comedogenic. This low rating means that it is unlikely to clog pores, making it generally suitable for individuals prone to acne, blemishes, or breakouts.
