Here's how much protein to build muscle: 0.7 to 1 gram per pound of body weight per day (1.6–2.2 g/kg). That's the research consensus, that's the answer, and everything below is the useful fine print — what the range means, how to actually hit it with food, and the things protein can't do no matter how much you eat.
Why that range (and not more)
Muscle growth runs on muscle protein synthesis — the rebuild process training triggers — and it needs raw material: amino acids from the protein you eat. The research picture is unusually clear: below about 0.6 g/lb, natural lifters leave gains on the table; benefits climb through the 0.7–1.0 zone; and above it, extra protein buys essentially nothing more for muscle — it just becomes expensive calories. The famous "1 gram per pound" gym rule survives because it's a fine ceiling: simple, safe, slightly generous. If you want one number, take 0.8 g/lb and stop thinking about it.
Make it concrete
At 0.7–1 g per pound of body weight: a 150-pound person lands at 105–150 g daily; 180 pounds → 125–180 g; 220 pounds → 155–220 g. One practical adjustment: if you're carrying a lot of extra weight, base the math on your goal-ish weight rather than the scale — protein feeds muscle mass, not total pounds, and the lower number is plenty.
Spread it out (the distribution bonus)
Total daily protein intake is the main event, but distribution adds a real edge: three to four feedings of 25–40 grams each beats cramming the day's protein into one giant dinner, because each solid feeding triggers its own round of muscle protein synthesis. The plain-language version of the amino-acid science: each meal needs enough quality protein to flip the "build" switch, and 25–40 g of a normal protein source flips it reliably. Breakfast is where most people run lightest — fix that meal and the day usually fixes itself.
The food math (protein sources cheat sheet)
Per typical serving: chicken breast (4 oz) ~35 g; lean beef (4 oz) ~30 g; salmon (4 oz) ~29 g; eggs ~6–7 g each; Greek yogurt (1 cup) ~17–20 g; cottage cheese (1 cup) ~25 g; tofu (1 cup) ~20 g; lentils (1 cup cooked) ~18 g; milk (1 cup) ~8 g; a scoop of whey protein ~24 g. Stack any three or four of those across a day and the target falls without a spreadsheet — high protein eating is mostly just putting a real protein at every meal and letting arithmetic do the rest.
Whey and the powder question
Whey protein is convenience, not magic — the same amino acids as food, faster to drink, cheaper per gram than meat. Food first because it brings everything else along; a scoop or two to plug the gaps a busy day leaves is exactly what powder is for, especially the post-session slot when cooking isn't happening. Nobody ever built muscle because of powder. Plenty of people hit their number because of it.
Special cases
Cutting: run the top of the range — on a calorie deficit, high protein is what tells your body to burn fat and keep the muscle mass you built. Plant-based: completely doable — aim toward the higher end and vary your protein sources (beans, lentils, tofu, tempeh, seitan, pea or soy protein) so the full amino-acid spectrum shows up daily. Beginners: same range as everyone; start at 0.7 and build the habit before optimizing the decimal. Kidney worries: the evidence says these intakes are fine for healthy kidneys; anyone with an existing kidney condition should set protein targets with their doctor, not a gym article.
What protein can't do
Protein is bricks; training is the blueprint. Without progressive training there's no build order to fill — no amount of shakes creates muscle growth on its own. Sleep is the construction shift, calories are the budget (building well wants a slight surplus — the lean bulk guide runs that math), and patience is the timeline (honest schedule here). Hitting your protein number is necessary, boring, and nowhere near sufficient — which is exactly why the people who quietly hit it every day win.
A day that hits 140 grams
Breakfast: three eggs plus a cup of Greek yogurt — about 40 g. Lunch: chicken bowl — 45 g. Afternoon: shake with a banana — 25 g. Dinner: salmon and rice — 30 g. Total: ~140 g, four flipped switches, zero suffering, and nothing on the plate a normal person wouldn't eat anyway. That's what the target looks like in real life — a rhythm, not a diet.
Quick answers
Does protein before bed help? Modestly, yes — overnight is prime repair time, and a slow protein like Greek yogurt or cottage cheese feeds it; a small edge, cheaply bought. Can you build muscle on less? Some, especially as a beginner — but you're driving with the parking brake half on; the range exists because it works. Do I count protein on rest days? Absolutely — repair happens on the days off, so the target is daily, not sessions-only.
Pick your number. Hit it boringly, daily, for months. That's the entire protein secret — everything else is packaging.
0.8 grams per pound, spread across three or four real meals, food first and powder for the gaps. Write the number down tonight, aim breakfast at it tomorrow, and let consistency do what supplements only advertise.