RealAge, Inc. is an American media corporation that provides health information to consumers. The company’s stated mission is to encourage consumers to maximize their health and wellness by making their "RealAge" younger. It was founded by Michael Roizen, currently the chief wellness officer at The Cleveland Clinic. RealAge.com serves as the official online home for both Michael Roizen and Mehmet Oz, coauthors of the best-selling YOU Book series. On this website, users typically fill out a questionnaire about their health history, which is then used to generate personalized content, including highly targeted advertisements. Most revenue comes from pharmaceutical companies paying to advertise their drugs to individuals who have taken the website test and become members.

RealAge has fueled five New York Times #1 best-selling books, including RealAge: Are You as Young as You Can Be?, which has been promoted by Oprah Winfrey, [1].

RealAge is wholly owned by Hearst Magazines, which purchased it for an estimated $60 million to $70 million in 2007, when the company had $20 million in revenue. As of 2009, the company was profitable, making its money from pharmaceutical companies for which it compiles test results of RealAge members to whom it sends highly targeted marketing messages by e-mail.

Dr. Michael Fredric Roizen (born January 7, 1946) is an American anesthesiologist and internist, an award-winning author and the chief wellness officer at the Cleveland Clinic. He completed a tour of duty in the Public Health Service and has 165 peer reviewed publications and 100 medical chapters, 14 US patents, started six companies, served on Food and Drug Administration (FDA) advisory committees for 16 years, and chaired an FDA advisory committee. He also co-invented a drug, Methylnaltrexone (MTNX, trade name Relistor), and took it through phase 2 trials. In May 2008 Methylnaltrexone received FDA approval for marketing in the United States (he has sold his rights to that drug).

He became famous^{[according to whom?]} for developing the Real Age concept and has authored or coauthored five number one New York Times best sellers, including Real Age and four in the YOU series—those with Dr. Mehmet Oz.

He has been praised for encouraging Americans to exercise and live healthier lives - and has been an outspoken critic of politicians who use health funds for other purposes - particularly for taking tobacco settlement money and using it for unintended purposes. Besides advocating for a healthier lifestyle today, Roizen has speculated that by 2023 one of the 14 areas of aging might have a breakthrough that will allow us to live until 160 with the same quality of life as at age 45. This speculation has been met with both criticism as well as agreement.