Ectoine is widely used in cosmetic and skincare products due to its strong protective and stabilizing properties. It helps shield skin cells from environmental stress such as UV radiation, pollution, and extreme temperatures. By maintaining cellular integrity, it reduces signs of aging, soothes irritation, and supports skin hydration. It is commonly found in creams, serums, and lotions designed for sensitive or stressed skin. In pharmaceuticals, ectoine acts as a natural protectant for cells and proteins, making it useful in formulations for respiratory health, such as nasal sprays and throat lozenges, where it helps protect mucous membranes from dryness and irritants. It is also applied in biotechnology to stabilize enzymes and other biomolecules during storage and transportation, improving their shelf life and performance under harsh conditions.