Formulated with 95% galactomyces ferment filtrate, the COSRX Galactomyces 95 Tone Balancing Essence is a fan favorite for its ability to hydrate, fortify the skin barrier to prevent moisture loss, and brighten uneven skin tone. Galactomyces is a type of yeast lauded for its brightening, hydrating, softening, and antioxidant properties; its fermentation makes it better able to penetrate deep into the skin. Niacinamide is the second ingredient to help lighten dark spots, while hyaluronic acid (the third ingredient) plumps up fine lines for firmer, brighter skin. This is a great product for anyone looking for a one-and-done type of essence or to layer into your multi-step routine.