Linda D. Applegarth, Ed.D, Director, Psychological Services, NewYork-Presbyterian Hospital/Weill Cornell Medical Center, The Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, explains how having difficulty naming 5 close friends can affect your health.

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.