Light stabilizers are essential additives used to protect cosmetic formulations and packaging from the damaging effects of ultraviolet (UV) and visible light. Their main role is to prevent fading, yellowing, viscosity changes, changes in the intensity and type of fragrance, and reduced shelf life of the product due to the stabilization of active ingredients. As a result, the appearance, performance, and safety of the product are maintained over time.
They are incorporated into cosmetic formulations to improve light stability, particularly for products such as sunscreens, lip balms, nail polishes, foundations, shampoos, fragrances and the products with transparent or translucent packaging.
some key types of light stabilizers used in cosmetics are:
UV Absorbers: Ingredients like benzophenones and oxybenzone absorb UV rays and prevent damage.
Hindered Amine Light Stabilizers (HALS): These compounds neutralize free radicals formed by UV exposure, extending product stability.
Antioxidants: Ingredients like vitamin E and green tea extract help counteract oxidative stress caused by light exposure