Trichloroacetic Acid (TCA) is a chemical that is often used to peel the skin. This is a medium strengthened ingredient that has been formulated in several tattoo fading products. It is believed that TCA has the ability to reduce the look of fine lines, helps even out the look of the skins tones and can improve the look of discolorations on the skin. Some manufacturers feel that TCA works effectively to diminish the look of tattoos. Although TCA has been shown to reduce the look of tattoos, this ingredient is potentially harmful and may promote side effects.