Sarfraz J. Zaidi, MD, endocrinologist on staff at Los Robles Hospital and Medical Center, will discusses the power of vitamin D at a free community health education lecture from 9 to 10 a.m. Thurs., March 25 at The Oaks mall near Macy’s Women’s store on the lower level, Thousand Oaks.

Zaidi will explain how vitamin D influence diseases such as heart disease, cancer and diabetes.

Reservations aren’t necessary. Morning refreshments will be served.

The seminar is part of “Health Chat,” a free community health education outreach program sponsored every third and fourth Thursday morning of the month by Los Robles Hospital in conjunction with The Oaks.