Day by day, Grecian Plus gradually replaces gray with natural-looking color. You can stop anytime and leave a little gray, or keep going until all the gray is gone. You decide. And it looks so natural no one can tell you colored your hair - they'll just know you look great. How Grecian Plus works. Different hair colors are the result of different amounts of melanin, nature's coloring protein. Darker hair simply has more melanin than lighter hair. As melanin production decreases with age, hair turns gray. Grecian Plus has the unique ability to replace lost melanin with a similar-acting pigment. You can regain just the right amount of lost color by applying Grecian Plus for fewer or more days. Grecian Plus works for any color hair. Makes thinning hair thicker, fuller. Grecian Plus contains a hair-thickening ingredient that works by expanding hair's diameter. Plus, it actually repairs and strengthens hair, reducing hair loss from breakage.