No matter which way you lose weight, dropping the kilos for good comes down to developing a healthy relationship with food and adopting positive habits. That said, we know that losing weight isn't easy. In fact, not losing weight when you've been trying to for a while can be extremely frustrating. That's why we asked some of the top dietitians to explain why your diet isn't working and why you're having trouble dropping those extra kilos. Learn what surprising mistakes you might be making and how to get on a sustainable path to weight loss success.