I'm going to be frank with you: I write about health and nutrition on a regular basis, but I have no idea what a calorie is. So I asked Samantha Rigoli, a registered dietician with Healthy to the Core ...

Basically, a calorie is a unit of energy; it measures how much energy a food provides to the body. Here are a few points to help clear up calorie confusion: How many calories are in a pound? It has ...

Tracking your calorie intake can be a helpful tool for weight management, as it helps you understand your eating habits and create a calorie deficit, which is essential for weight loss. While calorie ...

Calorie density (also called energy density) is the number of calories in a given weight or volume of food, often per 3.5 ounces (100 grams). Low-calorie-density foods let you eat larger, more filling ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. When you track an ...

Calorie-deficit diets slowly and temporarily limit the number of calories you consume each day. When in a calorie deficit, your body burns more calories than it takes in, which may promote weight loss ...

Some individuals require a 2,000 calorie diet to maintain a moderate weight, while others may need to reduce or increase their calorie intake to 2,000 calories a day to lose or gain weight. Although ...