Most people who plateau on a fat-loss diet don't need fewer carbs or more cardio — they need more protein. Get this number right and the deficit does its job: weight comes off as fat, not muscle. Get it wrong and the scale moves while your shape doesn't.
The single number to remember
For an adult on a fat-loss diet: 1.8–2.2 grams of protein per kilogram of body weight, per day.
That's it. Whether you're vegetarian, non-vegetarian, 71 kg or 92 kg, in your twenties or your sixties — the gram-per-kg target sits in that band. The lower end (1.6) works for someone who isn't lifting; the upper end (2.2) is what we use for anyone training seriously while in a deficit.
For a 70 kg adult targeting fat loss, that's 126–154 g of protein/day. For a 90 kg lifter, 162–198 g. You can dial in your exact number with our fat-loss macro calculator which spits out grams of protein, fat and carbs based on your weight and goal.
Why this matters more than any other macro choice
When you eat at a calorie deficit, your body needs amino acids — the building blocks of muscle, organs, immune cells, hormones. If you don't supply enough through diet, the body breaks down its own muscle to free up amino acids for the priority tissues (brain, gut, immune system).
That's a problem because muscle is the bank. Lose 5 kg over 12 weeks where 1 kg is muscle and 4 kg is fat: great recomposition. Lose 5 kg over 12 weeks where 3 kg is muscle and 2 kg is fat: scale weight looks identical, but you now have a lower metabolism, weaker training capacity, and a softer-looking body at the "new" weight. You'll regain it faster too, because you've dropped your TDEE permanently.
High-protein deficits prevent the second outcome. Mettler et al. (2010), Helms et al. (2014), and several follow-up studies all found the same thing: at protein intakes around 2 g/kg in a deficit, lean mass retention was significantly better than at 1 g/kg or below.
What if I eat less protein than the target?
You'll still lose weight as long as you're in a calorie deficit. But the composition of that loss tilts toward muscle. Below ~1 g/kg, lean-mass losses can hit 30–40% of the total over a multi-month cut, vs ~10% at 2 g/kg. The short version: same scale outcome, very different mirror outcome, very different long-term metabolism.
You'll also be hungrier. Protein is the most satiating macro per calorie, and high-protein meals reliably trigger more fullness signalling than equivalent-calorie carb or fat meals. Cutting protein to fit a lower kcal budget makes the diet harder, not easier.
Hitting the target on an Indian diet (vegetarian or not)
Indian diets — both vegetarian and non-vegetarian — typically deliver 35–60 g of protein per day by default. That's well below the fat-loss target for most adults. Hitting 1.8 g/kg requires deliberate inclusion of protein-dense foods at every meal, not just one.
Practical numbers per ~100 g serving:
- Paneer — 18 g protein
- Tofu — 8 g
- Greek curd / strained yoghurt — 6 g per 100 g (12 g per 200 g tub)
- Cooked dal — 6–8 g per katori (depends on dal type)
- Cooked rajma / chana — 8–9 g per katori
- One large egg — 6 g
- Chicken breast (cooked) — 31 g
- Whey protein scoop — 24 g per 30 g
- Sprouts (mixed) — 8 g
A vegetarian 70 kg adult hitting 130 g protein/day might land at: 200 g curd at breakfast (12 g) + 150 g paneer at lunch (27 g) + 1 katori dal + 1 katori sprouts (16 g) + 200 g paneer at dinner (36 g) + 1 whey scoop post-workout (24 g) = 115 g. Add another katori of dal or beans and you're at target.
Most people's real problem isn't the diet — it's the dispersion.
They eat 30 g of protein in a single dinner and 5–10 g across breakfast and lunch. Spread the protein across all your meals (20–40 g per meal) and you'll feel less hungry between meals and gain more from each meal's muscle protein synthesis pulse.
What about over-eating protein? Any risk?
For healthy adults with normal kidney function, eating up to 2.4 g/kg has no documented adverse effect in the long-term studies. Past that, you stop seeing additional benefit — muscle protein synthesis caps out, and the surplus protein is either burned for energy or stored.
The "high protein damages kidneys" claim refers to people with existing chronic kidney disease, where any high-protein intake can accelerate decline. If your kidneys are healthy, this doesn't apply to you. If they're not, talk to a nephrologist.
How to actually pull this off
- Calculate your target. Run our fat-loss macro calculator to get your exact gram-per-day number based on weight, sex, activity, and target deficit.
- Audit a typical day. Track everything you eat for 3 days using a free app — most people are stunned how far below their target they really are. Now you have the gap to fill.
- Anchor each meal with a protein source. Breakfast: eggs/curd/paneer. Lunch: paneer/chicken/dal-with-rice. Dinner: same. One whey scoop post-workout if you train.
- Re-track once a week. The first 3–4 weeks of tracking are educational — by week 6 you'll be eyeballing it, and tracking only when something feels off.
The short version
1.8–2.2 g/kg of protein per day while you're in a fat-loss deficit. Hit the target, and a 5 kg loss looks like you trained while you cut. Miss it, and a 5 kg loss leaves you looking smaller-but-softer with a slower metabolism than when you started.
Run your macros below, then go look in your fridge.