How Much Protein Do You Actually Need to Build Muscle?

Ask ten people and you'll get ten different numbers, most of them either far too low (leftover advice from decades-old nutrition guidelines) or unnecessarily high (usually from someone with a protein powder to sell). The actual evidence-backed range is narrower and simpler than either extreme.

The number that matters

For building muscle, roughly 1.6-2.0g of protein per kilogram of bodyweight per day covers almost everyone, with most research showing no additional muscle-building benefit past that range. If you're actively cutting calories at the same time, pushing toward the higher end (up to about 2.2g/kg) helps protect the muscle you already have while you're in a deficit.

Past that upper range, extra protein isn't harmful, it's just not doing anything extra for muscle growth. At that point it's simply displacing calories that could go toward carbs fueling your training or fats supporting hormone production.

Why bodyweight, not a flat number

Generic advice like "eat 150g of protein a day" ignores that a 55kg person and a 100kg person have completely different amounts of muscle tissue to support. Scaling to bodyweight is what actually makes the number meaningful, which is why it's worth calculating your own rather than copying a number from someone else's plan.

Hitting it without eating chicken all day

Spreading protein across 3-5 meals, roughly evenly, tends to be easier to hit consistently than trying to cram it into one or two large meals. A realistic day might look like eggs or Greek yogurt at breakfast, chicken or fish at lunch and dinner, and a whey shake or cottage cheese to fill any gap, rather than forcing every meal to be built entirely around a single protein source.