Abstract

A growing need for alternatives to replace synthetic cosmetic ingredients and sustainable production process led to interest in natural sources. Among the traditional sources, marine organisms, especially microalgae have shown considerable benefits in terms of land use, waste disposal, and bioactive compound contents. Skin aging is directly related to ultraviolet (UV) radiation which stimulates matrix metalloproteinase (MMP) expression. Continued exposure and increased age also corresponds to greater oxidative stress. Fatty acids, especially poly-unsaturated fatty acids (PUFAs) and antioxidants are major materials used in cosmetics to supplement skin aging defensive bioactive materials that are not synthesized in the human body or deficient. Microalgae are suitable alternatives not only for their eco-friendly cultivation process but also for the rich content of omega-3, omega-6, vitamin B, folic acid, carotenoids, and various pigments that act as antioxidants.