weight-loss · 1 min read
High protein low calorie foods, ranked
The best high protein low calorie foods are white fish, egg whites, non-fat Greek yoghurt and shellfish. Protein per calorie is the metric that matters when you are eating less.
Written by Lifebar Desk · Checked against the sources listed below
Published 03 Sept 2026
Key takeaways
- White fish, shrimp, egg whites and non-fat Greek yoghurt carry the most protein per calorie.
- Protein also has the highest thermic effect, 20 to 30% of its calories are used in digestion.
- Higher protein intake preserves lean mass during a calorie deficit.
When calories are limited, the useful question is not how much protein a food contains but how many calories it costs you to get it.
The ranking
| Food (100 g) | Protein | Calories | g per 100 kcal |
|---|---|---|---|
| Cod, cooked | 23 g | 105 | 22 g |
| Shrimp | 24 g | 99 | 24 g |
| Egg whites | 11 g | 52 | 21 g |
| Non-fat Greek yoghurt | 10 g | 59 | 17 g |
| Chicken breast | 31 g | 165 | 19 g |
| Cottage cheese, low fat | 11 g | 72 | 15 g |
| Tofu, firm | 17 g | 144 | 12 g |
| Lentils, cooked | 9 g | 116 | 8 g |
Why this ranking beats "high protein" labels
A protein bar with 20 g of protein and 240 calories scores 8 g per 100 kcal, about the same as lentils, at four times the price. Whole, lean foods dominate the list because they carry water and little fat.
The muscle-preservation angle
In a deficit, the body will use muscle for fuel unless it has a reason not to. Two reasons work: adequate protein and resistance training. Reviews consistently show higher protein intake during weight loss preserves more lean mass, which keeps resting metabolic rate higher.
Practical use
Build meals around one item from the top of that table, then add vegetables for volume and a measured portion of fat and starch. The satiety follows automatically.
Frequently asked
How much protein should I eat in a deficit?
Higher than at maintenance, roughly 1.6 to 2.2 g per kg of bodyweight, which protects muscle while you lose fat.
Does the thermic effect matter much?
It is real but modest. Protein burns 20 to 30% of its own calories in digestion versus 5 to 10% for carbohydrate, which adds up to perhaps 80 to 100 kcal a day on a high-protein diet.
Sources
Educational content, talk to your clinician before changing treatment.
