How much protein do you need to build muscle? A practical guide for lifters
How much protein lifters need to build muscle, how to spread it across the day, and how to hit your target without weighing every meal.
Key takeaways
- A large meta-analysis found gains in muscle mass plateaued around 1.6 g of protein per kg of body weight per day on average.
- For an 80 kg lifter that is about 130 g a day; going somewhat higher is reasonable but brings little extra.
- Spreading protein over three to five meals with a solid dose each is a practical way to reach the target.
- Total daily protein matters more than the exact minute you eat after training.
Protein is the nutrient lifters argue about most. The good news is that the research gives a fairly clear answer, and hitting it does not require weighing every gram of chicken.
How much protein do you need?
A large meta-analysis of resistance-training studies found that the benefit of extra protein on muscle mass levelled off around 1.6 g per kg of body weight per day, on average. Because that is an average, some people benefit from a bit more; the International Society of Sports Nutrition describes a range of roughly 1.4 to 2.0 g/kg/day for people who train.
| Body weight | ~1.6 g/kg/day | Upper range (~2.0 g/kg/day) |
|---|---|---|
| 60 kg | ~95 g | ~120 g |
| 70 kg | ~110 g | ~140 g |
| 80 kg | ~130 g | ~160 g |
| 90 kg | ~145 g | ~180 g |
If you are well below these numbers on most days, protein is worth fixing before anything else in your diet.
How should you spread it across the day?
A practical approach is three to five meals with a solid dose each, around 0.3–0.4 g/kg per meal (about 25–40 g for most lifters). This makes the daily target easy to reach and avoids trying to eat half of it at dinner.
The “anabolic window” right after training matters less than once believed: total daily protein is what counts most. Eating a protein-rich meal after training is still a convenient habit, especially after a fasted session.
Easy protein sources
- Meat, poultry, fish and eggs.
- Greek yoghurt, skyr, cottage cheese, milk.
- Tofu, tempeh, lentils, chickpeas and beans.
- A protein shake when a meal falls short.
How to hit your target without counting everything
- Anchor every meal with a protein source the size of your palm or more.
- Know your three or four usual meals and roughly how much protein they contain.
- Check a few typical days, not every day, to see whether you are close.
- Fix the weakest meal, often breakfast or lunch on workdays.
When protein is the reason a lift stalls
Low protein rarely stops a lift on its own, but combined with short sleep or a calorie deficit, it slows progress. If your top sets are flat and your workdays look like coffee, a sandwich and a late dinner, start there. See why your bench press is stuck and smart scale body fat for tracking lean mass.
How rythme helps
With rythme’s AI meal scan, you take a photo of your plate and get an estimate of calories, protein, carbs and fat in seconds, which you can adjust before adding it to your day. Your meals sit next to your workouts, so you can see whether low-protein days line up with flat sessions.
FAQ
How much protein should I eat per meal?
A practical target is roughly 0.3 to 0.4 g per kg of body weight per meal, about 25 to 40 g for most lifters, over three to five meals.
Do I need protein shakes?
No. Shakes are a convenient way to reach your target, not a requirement. Whole foods work just as well.
Do I need more protein when cutting?
Protein needs are at least as high during a calorie deficit, and many lifters aim for the upper end of the usual range to protect muscle.
Sources
- Morton et al. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength. British Journal of Sports Medicine.
- Jäger et al. (2017). International Society of Sports Nutrition position stand: protein and exercise. JISSN.
This article is general information, not medical advice. Talk to a qualified professional about your own health.
