Why protein burns more calories to digest
Protein costs the most calories to digest, about 20-30% of its own calories versus near zero for fat. A small, honest reason extra protein helps in a deficit.
When you eat, your body spends calories just to chew, digest, absorb and store the food. This is called the thermic effect of food, or TEF. It is a small part of your daily burn, usually around 5-15% of the calories you eat. Here is the interesting part: not all foods cost the same to process. Protein is the most expensive macro for your body to handle, fat is the cheapest. So the same 100 calories from dal or eggs is not quite the same as 100 calories from ghee, once your body does the work of digesting it. This is not a magic weight-loss trick. The number is small. But it is one more honest reason a little extra protein can help when you are in a deficit, on top of keeping you full and protecting your muscle.
A normal mixed Indian day
On a typical day of around 2000 calories with a normal mix of rice, roti, dal, some sabzi and a little oil, your TEF lands near the middle of the 5-15% range, so roughly 150-200 calories spent just processing the food. That is already happening for free inside you every day, whatever you eat. The question is only how much you can shift it by changing what the calories come from.
Assumptions: ~2000 kcal/day, typical Indian mixed meal with moderate protein, moderate fat, mostly carbs. TEF for a mixed diet is ~5-15% per Westerterp.
Swap some fat and carb for a little more protein
Keep your total calories the same, but shift around 200-300 calories worth of food from fat and refined carbs towards protein-rich foods like dal, paneer, egg, chicken, curd or soya. The deficit engine stays the same; you are only changing where the calories come from.
Assumptions: Shifting ~250 kcal from fat/carb to protein: extra TEF roughly +0.15 to +0.25 of those 250 kcal = ~40-60 kcal, plus a small increase on the rest of the day from a higher overall protein fraction. A realistic upper-mid estimate is around +50-100 kcal/day. This is modest and not a substitute for the deficit itself.
A little more protein, not a crazy all-protein diet
- Add one protein source to each meal: an egg at breakfast, a bowl of dal at lunch, paneer or chicken or soya at dinner. You do not need supplements to do this.
- Keep the total calories the same. The point is swapping, not stacking. More protein on top of your normal food just adds calories.
- Do not chase an all-protein diet. Carbs and fat are still part of a normal Indian thali and they are not your enemy. The TEF gain from going extreme is small and not worth feeling awful for.
- Pair this with the things that actually move the needle: your deficit, some strength work to keep muscle, and enough sleep. TEF is a small bonus on top, not the main event.
- If you log your food in Burnie, you can see your protein intake next to your deficit in one screen, which makes the swap easy to track without any maths.
The bottom line
Protein really does burn more calories to digest than carbs or fat, roughly 20-30% of its own calories versus near zero for fat. Over a full day, nudging some of your food towards protein adds maybe 50-100 extra calories of TEF. That is small and real, not a hack worth obsessing over. The bigger honest wins from a little extra protein are that it keeps you fuller and helps protect your muscle while you lose fat. The deficit is still the engine. Burnie just logs your food and shows you that deficit clearly, and lets you see your protein alongside it so the swap is easy. Get the deficit right first, then let protein do its small, useful part.