There is no cure for Type I diabetes, so it seems she was either mistaken or misdiagnosed:
. . . doctors interviewed agreed that if Berry was truly a Type 1 diabetic, it would be suicide to simply stop taking insulin. They surmised that the 41-year-old actress was either mistaken, misinformed or misdiagnosed, and probably always had Type 2, which tends to affect people later in life and can in some cases be overcome with a change in diet.
