Bucking the trends: calories still count.  Protein, carbs, fats--specialized diets may work for some, but the bottom line is still calorie reduction.
D015992:Body Mass Index; D031204:Caloric Restriction / Q000379:methods*; D004038:Diet, Reducing / Q000379:methods*; D006801:Humans; D006949:Hyperlipidemias / Q000178:diet therapy; D024821:Metabolic Syndrome / Q000178:diet therapy; D009765:Obesity / Q000097:blood / Q000178:diet therapy*