TEF is the energy your body uses to digest, absorb, and process food.
Protein: 30% TEF. Carbohydrates: 10% TEF. Fats: 3% TEF.
This tool is most useful for tracking trends rather than obsessing over a single data point. Run the calculation monthly with consistent measurement conditions to see whether your metric is moving in the right direction.
The most common mistake is treating the result as a precise measurement rather than an evidence-based estimate. All body metric calculators have margins of error — use the result as a tracking baseline, not a clinical diagnosis.
Someone returning from a period of inactivity uses the calculator to establish a baseline health metric before starting a new training programme. Monthly recalculations with consistent measurement conditions create a trackable trend that scale weight alone cannot provide.
Calories burned during digestion: average 5-15% of total calorie intake.
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