For decades, counting calories was considered a cornerstone of evidence-based obesity treatment. Today, a better understanding of obesity and the rise of GLP-1s for weight loss have prompted many ...

What Is a Calorie Deficit? Calories are a measure of the amount of energy in food. All the cells in your body require energy to work properly, just like a car needs fuel. They get that energy from the ...

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. If you want to start ...

Lindsey DeSoto, RD, is a nutrition writer, medical reviewer, and registered dietitian who helps clients improve their diet for health-related reasons. Her writing covers a variety of topics, including ...

Aviv Joshua, MS, RDN, LDN, is a clinical dietitian with over 10 years of experience in healthcare. Eggs have protein that helps keep you full and control your blood sugar levels. Leafy greens are low ...

More people are now using AI apps to keep track of their diets. All it takes is a photo of a meal, after which the app estimates its calorie and nutrient content. However, a new study indicates that ...