Ectoine is widely used in skincare and cosmetic formulations due to its strong protective and stabilizing properties. It helps shield skin cells from environmental stressors such as UV radiation, pollution, and extreme temperatures. By maintaining cellular integrity, it reduces signs of aging and supports skin barrier function.

It is also effective in treating sensitive, irritated, or inflamed skin, making it a key ingredient in products for conditions like eczema and rosacea. Its ability to retain moisture enhances skin hydration, improving texture and comfort.

In addition to cosmetics, ectoine is used in pharmaceuticals and nasal sprays to protect mucous membranes and reduce irritation caused by dryness or allergens. Its biocompatibility and low toxicity make it suitable for use in eye care products and oral health applications.

Industrial applications include use in enzyme stabilization and biotechnology, where it protects proteins and biomolecules under harsh conditions.