How Do They Know How Many Calories Are In Food? My Honest 2026 Reality Check
To determine how many calories are in food, manufacturers primarily use the Atwater System, which calculates energy by adding up the fixed values of macronutrients: 4 calories per gram for proteins and carbs, and 9 for fats. While older methods involved literally burning food in a bomb calorimeter to measure heat release, today’s labels are…