Active SerumOne of Is Clinicals bestseller. This fast acting, long term, results oriented formula decreases the appearance of fine lines and wrinkles, visibly evens skin tone, and is excellent for blemish prone skin. Touted by physicians as "remarkable" and "phenomenal," Active Serum usually produces results within a couple of days. Potent activity will be noted upon application, as evidenced by a cooling tingling sensation. Excellent for all skin types and all