Used primarily in cosmetics and skincare products for its excellent moisturizing properties, squalene helps maintain skin hydration and supports the natural lipid barrier. It is easily absorbed and often included in anti-aging formulations due to its antioxidant activity, which helps reduce the appearance of fine lines and protect against environmental damage. In pharmaceuticals, squalene serves as an adjuvant in some vaccine formulations, enhancing the body's immune response. It is also used in dietary supplements for its potential cholesterol-lowering and immune-supporting effects. Due to its biocompatibility and low reactivity, it is suitable for sensitive skin and high-performance personal care products.