How Much Protein Do You Need to Build Muscle

For muscle growth most people need roughly 1.6–2.2 g of protein per kilogram of body weight per day. For a 75 kg person that is about 120–165 g of protein daily. This is supported by research; going above the upper end usually adds no extra muscle.

The easiest way to track this is a nutrition tracker — it counts protein automatically.

Where the 1.6–2.2 number comes from

Meta-analyses of resistance training show muscle gains plateau around 1.6 g/kg, with a practical upper bound near 2.2 g/kg (especially useful in a calorie deficit to preserve muscle while losing fat).

So more protein is not always better. Past a certain point the surplus is simply used for energy rather than extra growth.

Why protein is critical for muscle

Protein supplies amino acids — the building blocks for repairing and growing muscle tissue after training. Without enough protein, even a perfect program and recovery will not deliver full results. It is the third pillar alongside training and recovery.

How to spread protein through the day

Total daily intake matters more than timing, but distribution helps too:

• 3–5 meals of 0.3–0.4 g/kg (≈20–40 g) stimulate protein synthesis better than 1–2 large servings;
• a protein serving within a few hours of training is sensible, but the "anabolic window" is far wider than once believed;
• a protein serving before bed (e.g. cottage cheese) supports overnight recovery.

The best protein sources

Animal (complete amino-acid profile):

• chicken, turkey, lean beef
• fish, seafood
• eggs
• dairy: cottage cheese, Greek yoghurt, kefir

Plant:

• legumes (lentils, chickpeas, beans)
• tofu, tempeh, soy
• seitan

On a plant-based diet, combine sources and aim toward the upper end (2.0–2.2 g/kg), since digestibility is slightly lower.

Do you need protein powder

No, it is not required — it is just a convenient protein source, not magic. If you hit your target from food, you do not need powder. If you do not (short on time, low appetite), a shake closes the gap quickly and cheaply.

FAQ

Does high protein harm your kidneys?

For healthy people a high-protein diet does not harm the kidneys — this is well-supported by research. Caution applies only with existing kidney disease (then see a doctor).

How much protein when losing weight?

Lean toward 2.0–2.2 g/kg: in a calorie deficit, higher protein helps preserve muscle and keeps you fuller.

Can I hit my target on a vegan diet?

Yes, it is entirely doable — it just needs more deliberate planning and combining sources. A nutrition tracker makes this much easier.

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