Anticaking

Ingredients with anti-caking function help dry and loose components to remain loose and homogeneous. They reduce the tendency of the powder to clump, improve its fluidity and distribution in the formula, especially if the product comes into contact with moisture or contains very fine particles. In cosmetics, this is important for powders, dry shampoos, eye shadow, mineral makeup, and some toothpastes: the product is easier to type, more evenly applied, and retains a stable texture for longer. In the FDA reference materials, anti-caking agents are described as agents that maintain a free flowing state and improve the flow of powders, while CosIng highlights anticaking as a separate cosmetic function. (fda.gov)

On skin and hair, such components usually act not as active care, but primarily as technological assistants: they make the product easier to use and help evenly distribute the formula over the surface. Due to this, the coating may look smoother, without spots and dense lumps, and dry products collect less dust and shade more easily. Typical examples are Silica and Talc. Silicon dioxide is widely known as an agent that improves fluidity and prevents caking, and talc in cosmetics is used, among other things, to absorb moisture, prevent clumping and improve the tactile properties of the product. (pubchem.ncbi.nlm.nih.gov)

That is why the presence of such ingredients is especially valuable in powder formulas, where stability, easy dosing and pleasant application are important. They do not "cure" the skin or restore hair by themselves, but they significantly affect the consumer properties of cosmetics: the product remains crumbly longer, mixes better with other components and retains a neat appearance in the package. (pubchem.ncbi.nlm.nih.gov)