Have you noticed that many high-end face creams have a particularly smooth texture when applied to the skin, being neither greasy nor making the skin look dull? There is often an "invisible hero" behind this, and that hero is cosmetic silicone oil - IOTA556 (INCI name: Phenyl Trimethicone).
IOTA556, scientifically known as poly methyl phenylsiloxane, is a highly favored star ingredient in the beauty industry. Its biggest feature is that it is "moisturizing but not oily". Ordinary oils applied to the skin tend to have a heavy and oppressive feeling, but IOTA556 has excellent anti-stick properties. After application, it can quickly form a breathable and soft protective film. This not only makes the skin feel delicate but also provides a similar effect to a pure natural skin mask, being antioxidant and safe.
In addition to skincare, it is also a "luster enhancer" for hair. Adding IOTA556 to hair gel or conditioner can instantly restore the softness and luster of the hair, smoothing out frizz. Even more miraculously, although it is an oily component, it is extremely soluble in 95% ethanol (alcohol). This means it can be easily mixed into various transparent toners or sprays without making the product cloudy.
The next time you enjoy the silky experience brought by skincare products, take a look at the ingredient list. Maybe you can discover this behind-the-scenes hero that brings "premium skin sensation".