What does it mean if a cosmetic product is described as anhydrous?

When a cosmetic product is described as anhydrous, it specifically indicates that the formulation does not contain any water. This characteristic is important in various cosmetic and skincare products, as the absence of water can affect the product's texture, stability, and preservative needs. Anhydrous formulations often rely on oils and other emollients to provide hydration and texture, which can be beneficial for certain skin types, particularly those that are dry or dehydrated.

In contrast, anhydrous products are typically rich, concentrated, and can be more potent, as they do not have water diluting the active ingredients. This makes them suitable for specific formulations where water may not be desirable, such as in certain serums or oil-based products. Understanding this definition helps in making informed choices about product application based on individual skin needs and product characteristics.