What is the thermic effect of a 1000-calorie meal?

The thermic effect of food (TEF) refers to the energy expenditure associated with digestion, absorption, and metabolism of nutrients. Generally, TEF accounts for about 10-30% of the total caloric content of a meal, depending on its macronutrient composition. For a 1000-calorie meal, this means the thermic effect might range from approximately 100 to 300 calories. Higher protein meals tend to have a greater thermic effect compared to fats and carbohydrates.