Protein advice usually arrives as a percentage — "30% of your calories" — which is a strange way to give a nutrient target, because it moves every time your calorie intake moves. Eat less, and your protein target quietly shrinks exactly when you need it most.
Grams per kilogram of body weight is the honest unit. Here is what the numbers actually look like.
Three numbers, three different jobs
| Situation | Per kg body weight | What it does |
|---|---|---|
| Sedentary adult, no goal | 0.8 g | Prevents deficiency. A floor, not a target. |
| Losing weight, keeping muscle | 1.6–2.0 g | Protects lean mass in a calorie deficit |
| Training for strength or size | 1.6–2.2 g | Supports repair and adaptation |
For a 70 kg person that is 56 g at the floor and around 110–140 g in a deficit. The gap between those two numbers is where most "I lost weight but look softer" stories live.
Use a sensible body weight
If you carry a lot of excess weight, calculating from your current weight inflates the target. Using a target weight, or lean body mass, gives a more realistic number.
Distribution beats the daily total
Muscle protein synthesis responds to a dose, not a daily sum. Twenty grams at breakfast, twenty at lunch and a hundred at dinner is not the same stimulus as three balanced meals — even though the day totals identically.
A practical rule: aim for 25–40 g of protein in each main meal. Most people find breakfast is the meal that fails this test. Fixing breakfast alone often adds 20–30 g to the day without touching anything else.
What 30 g actually looks like
- Chicken breast, 120 g cooked — about 36 g
- Greek yoghurt, 250 g — about 25 g
- Four eggs — about 24 g
- Canned tuna, one tin drained — about 25 g
- Lentils, 200 g cooked, plus bulgur — about 18 g combined
- Cottage cheese, 200 g — about 22 g
Plant sources need slightly larger portions and a bit more variety across the day, since their amino acid profiles differ. Mixing legumes with grains — the way most traditional kitchens already do — covers this without any arithmetic.
Kiva's shortcut
Don't chase the exact gram. Put a clear protein source on the plate at every meal and the daily total takes care of itself.
Why protein makes dieting easier
Two effects do most of the work. Protein is the most satiating macronutrient per calorie, so higher-protein meals tend to reduce later intake without any conscious restriction. And in a calorie deficit, adequate protein plus some resistance training shifts more of the weight you lose towards fat rather than muscle.
That is the whole mechanism. No metabolic magic, no fat-burning window.
Timing: what matters and what doesn't
The "anabolic window" — the belief that protein must be eaten within 30 minutes of training — has not held up. Total daily intake and per-meal distribution matter considerably more than the clock.
What does help: not going long stretches with no protein at all, and having a meal within a few hours either side of training. If your session is at 7 a.m. before breakfast, eat afterwards. That is the extent of the rule.
Common mistakes
- Counting the whole meal as protein. A bowl of pasta with a little cheese is a carbohydrate meal with a protein garnish.
- Assuming raw and cooked weights are the same. Meat loses roughly a quarter of its weight when cooked, so gram values shift.
- Buying protein-labelled snacks. Many contain 6–10 g and the price of 40. Read the panel, not the front.
- Ignoring breakfast. The cheapest fix in the entire day.
Frequently asked questions
How much protein per day is enough?
The general adult minimum is around 0.8 g per kilogram of body weight, which prevents deficiency. For preserving muscle while losing weight or training regularly, most evidence points to a range of roughly 1.4–2.0 g per kilogram.
Can too much protein damage your kidneys?
In people with healthy kidneys, higher protein intakes have not been shown to cause kidney damage. If you have existing kidney disease, protein intake should be set by your doctor or a dietitian.
Do I need a protein shake?
No. Powder is a convenience, not a requirement. Yoghurt, eggs, milk, legumes, fish and meat cover it. A shake helps only when hitting the target from food is genuinely hard.
Keep reading
How to track calories accurately (without hating it)
Why most food logs drift 20–30% off, and the five habits that make tracking accurate enough to be useful.
Is 10,000 steps a day a real target?
The number came from a 1960s pedometer name. What the research since then says about how many steps actually matter.