Obesity rates have risen in recent decades. In 2012, over 66% of the U.S. population had either overweight or obesity (1). If you eat more calories than you need for energy, weight gain can result.

Registered dietitian Jill Weisenberger once had a client who kept a puzzling food journal. The calorie counts were all out of whack. The woman’s tuna sandwich had 33 calories. An apple: 144. Turns out ...

Most people know to consider their calorie intake when trying to lose or gain weight. Calories are a measure of the energy stored in foods or in the tissues of your body. Typical recommendations for ...