Research
Energy balance
The thermic effect of food (TEF) varies significantly by nutrient type, with proteins inducing 20-30% energy expenditure, carbohydrates 5-10%, and fats 0-3%.
To maximize the energy cost of digestion, prioritize protein in your diet. Your body burns significantly more energy processing protein (20-30%) compared to fats (0-3%) or carbs (5-10%). This doesn't replace the need for a caloric deficit, but it adds a small metabolic advantage to higher-protein diets.
StrongSupportsHIGH confidence
Measured TEF are 5 to 10% of the caloric content of carbohydrates administered, 0 to 3% of that of lipids and 20 to 30% of that of proteins or amino acids
Why this rating
Based on multiple cited studies using indirect calorimetry in healthy humans.
Source
Thermic effect of food and sympathetic nervous system activity in humans
Luc Tappy · annales de biologie animale biochimie biophysique · 1996
DOI 10.1051/rnd:19960405
narrative_reviewCited 226×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Obese, insulin-resistant individuals exhibit a defective (reduced) thermic effect of food, specifically for glucose, which may contribute to weight gain or impaired weight loss, though it cannot explain the majority of excess body weight.Good
- Insulin stimulates muscle sympathetic nerve activity, which contributes to 'facultative thermogenesis' (energy expenditure beyond obligatory ATP hydrolysis), particularly in response to glucose and fructose.Moderate
Related findings · Energy balance
- Achieving a total body weight loss of 10-15% (or >10-15 kg) through Total Diet Replacement (TDR) induces remission of Type 2 Diabetes in individuals with short-duration disease.Strong
- Bariatric surgery is superior to medical management alone for inducing significant long-term weight loss, remission of type 2 diabetes, and reduction in mortality for patients with BMI ≥ 40 or ≥ 35 with comorbidities.Strong
- Achieving type 2 diabetes remission requires significant weight loss (≥15 kg) via major caloric restriction, independent of macronutrient composition.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →