Michael A. Smith, M.D., is the senior health scientist and online personality for Life extension, the world''s leading organization dedicated to extending the healthy human life span. He is an author, blogger, creates and conducts webinars, and appears in informational health human life span. He is an author and blogger, creates and conducts webinars, and appears in informational health and wellness videos. He was a recurring guest in 2012 on "The Suzanne Show" with Suzanne Somers on the Lifetime Network; appeared on "Gem of the Caribbean," a television show dedicated to disease prevention; and is currently seen in several regional infomercials as an expert guest. He is also heard on numerous syndicated national health radio shows. A graduate of the University of Texas, Southwestern Medical Center in Dallas, Texas, Dr. Smith completed an internship in internal medicine at the University of Utah and three years of a residency in radiology at UT Southwestern Medical Center.