If I lose weight on a fad diet, how can I keep it off?

If I lose weight on a fad diet, how can I keep it off?

Andrea Giancoli (Registered Dietician ) gives expert video advice on: How many pounds per week should I lose for safe weight loss?; If I lose weight on a fad diet, how can I keep it off?; Is gastric bypass surgery a good way to lose weight? and more...