How Your Body Uses Calories

 The percentage of calories a human body needs is context-specific—it depends on your basal metabolic rate (BMR), activity level, and health goals. However, here's a breakdown:


  1. Basal Metabolic Rate (BMR): About 60-70% of your daily calorie needs are for basic bodily functions like breathing, circulation, and maintaining body temperature.

  2. Physical Activity: This accounts for 15-30% of your calorie needs, depending on how active you are. Sedentary individuals need less, while athletes or physically active people require more.





  1. Thermic Effect of Food (TEF): Digesting, absorbing, and metabolizing food uses 10-15% of the calories you consume.



Total Energy Needs

The total calorie requirement varies based on factors like age, weight, gender, and activity level. For an average adult:

  • Sedentary: ~1,800–2,200 calories/day
  • Moderately active: ~2,200–2,800 calories/day
  • Very active: ~2,800–3,600+ calories/day

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