Dr Rossi's The Catalyst Serum unlocks visibly smoother skin. Infused with Bio-Theriac complex, this transformative serum helps to even skin tone while combatting sensitivity. It also significantly boosts skin firmness, diminishing the appearance of fine lines and wrinkles. The Catalyst addresses multiple skin concerns in one powerful formula, working for a youthful and rejuvenated complexion. Its gentle formula is suitable for all skin types, even sensitive skin.