Ian K. Smith , M.D., is the number one bestselling author of The Fat Smash Diet, Extreme Fat Smash Diet, The 4 Day Diet, The 4 Day Detox, Happy and EAT . He is a medical contributor on The View and The Rachael Ray Show, the diet expert on VH1's Celebrity Fit Club, and host of the nationally syndicated radio show Healthwise on American Urban Radio Networks. He writes a medical column for Men's Health magazine. He has written for various publications including Time and Newsweek , and been featured in People, Essence, Ebony and Cosmopolitan , among others. He is a former medical correspondent for NBC and for NewsChannel 4 in New York, where he filed reports for NBC's Nightly News and The Today Show.

In 2007, he created the 50 Million Pound Challenge, a free national weight loss initiative with a growing list of more than 1.9 million people registered. Dr. Smith graduated from Harvard College with an AB and received a master's in science education from Columbia University. He attended Dartmouth Medical School and completed thelast two years of his medical education and graduated from the University of Chicago Pritzker School of Medicine. A native of Danbury, Connecticut, Dr. Smith currently resides in Manhattan.