About the Author

Liz Vaccariello is senior vice president and editor-in-chief of Prevention, the #1 healthy lifestyle magazine brand with nearly 11 million readers. Vaccariello regularly appears on Today and Good Morning America. She's also been featured on The Biggest Loser, Rachael Ray, the Early Show, and The View.

Cynthia Sass, MPH, RD, Prevention's former nutrition director, has more than 15 years of experience helping people lose weight.