On the Action Mechanism and Usage Precautions of Isocetyl Myristate
Isocetyl Myristate is an emollient commonly used in cosmetics and personal care products. It features excellent spreadability and skin feel, and can enhance the user experience of products. It usually appears as a colorless to pale yellow transparent oily liquid.
Main Functions in Cosmetics
Cetyl Myristate is primarily used as a skin protectant and emollient in cosmetics, with its working mechanisms reflected in the following aspects:
Film-forming Moisture Locking & Skin Softening: It forms a breathable yet water-repellent protective film on the skin surface, effectively locking in moisture and preventing Transepidermal Water Loss (TEWL), so as to protect and condition the skin, leaving it soft and smooth.
Skin Feel & Texture Improvement: This ingredient boasts excellent emulsifying, dispersing and lubricating properties. It can significantly reduce the greasiness caused by other oils in the formula, deliver a silky or velvety touch during application, and features good permeability that allows it to be quickly absorbed by the skin without leaving an oily residue.
Auxiliary Dispersion & Penetration Promotion: In cosmetic formulas, it helps pigments (such as powders) disperse evenly for a more adherent and natural makeup finish. Meanwhile, it can slightly modify the structure of the stratum corneum, helping other active ingredients in the formula (such as whitening and anti-aging components) better penetrate into the deep skin layers.
Precautions & Safety Profile
While this ingredient is generally recognized as safe at reasonable concentrations (e.g., no more than 6% in leave-on products), its certain occlusivity may bring risks with long-term use or for specific skin types. It tends to form an occlusive layer on the skin, which may cause acne, pimples or aggravate inflammatory reactions for people with sensitive or acne-prone skin. Therefore, those with acne-prone skin should be cautious when using skincare products containing this ingredient.