Norman E. Rosenthal, MD Dr. Rosenthal was born in Johannesburg, South Africa. Internationally recognized for his research on depression, Dr. Rosenthal and his team were responsible for describing SAD, also known as winter depression, and developing the field of light therapy. He also is in demand to lecture on the use of herbal remedies and dietary supplements. Dr. Rosenthal is well known for his skill in communicating complex medical information to the general public in an interesting, entertaining, and readily accessible way.
