“We try not to vilify any food, except sugar,” added Dr. Aronne. “Having it as a treat is what sugar is for; it’s not meant to be the main part of your meal.” Yet added sugars in the form of sweeteners and syrups to flavor processed foods sees the average adult eating 20 teaspoons of hidden added sugar every day, or an extra 320 calories, according to the USDA’s recent nationwide food consumption survey. And then there’s sugar-sweetened beverages like sodas, sports drinks, juices and flavored coffees and teas stirred with empty calories. “The typical glass of orange juice has three oranges in it; that’s the calories of three oranges. But it’s easy to drink a glass of orange juice and still eat a number of other things,” added Dr. Aronne. “You’re better off just eating a single orange and feeling full.”
Like protein, fiber slows the rate at which your body plows through carb calories so you feel full for longer and maintain steadier blood sugar levels, one reason why research consistently links fiber intake to weight loss. That means fibrous whole grain bread tends to be a better choice than white bread and also explains why fruits, which contain fiber and valuable vitamins in addition to sugar, beat straight-up candy every time.
In a way, moderate-intensity physical activity is that "magic pill" a lot of people are looking for, because the health benefits go beyond keeping your waistline trim: Not only can it reduce your risk of cancer, stroke, diabetes and heart attacks, but studies have shown that physical activity can significantly improve the moods of patients with major depressive disorders.