Protein is the one macronutrient almost everyone agrees on and almost everyone still gets wrong — usually by under-eating it, occasionally by turning it into a religion. Let's cut through it.
The number that actually matters
For people training to build or keep muscle, the research consistently lands around 1.6 to 2.2 grams of protein per kilogram of bodyweight per day (roughly 0.7–1g per pound). For most lifters, aiming near the middle of that range is plenty. Going far above it doesn't add much — protein has a ceiling of usefulness for muscle building.
Total protein across the day matters far more than the timing tricks people obsess over. Hit your daily target first; optimise the details later.
Why most people fall short
It's rarely a knowledge problem — it's a distribution problem. People eat almost no protein at breakfast, a little at lunch, and try to cram it all into dinner. Spreading protein across 3–4 meals, each with a solid serving, makes the daily total far easier to hit and may modestly help muscle building.
What a serving looks like
- A palm-sized portion of chicken, beef, fish or tofu.
- A cup of Greek yogurt or cottage cheese.
- Three whole eggs plus a couple of extra whites.
- A scoop of whey or a plant blend when whole food isn't practical.
Build each meal around one of these and the daily number takes care of itself.
Do you need a shake?
No — but it's convenient. A protein shake is just food in a faster format. If you struggle to hit your target with meals alone, one shake a day bridges the gap cheaply. If you already hit it with food, you don't need one.
Common myths, quickly
- "Too much protein wrecks your kidneys." In healthy people, higher protein intakes are well tolerated. (If you have existing kidney disease, that's a conversation for your doctor.)
- "You can only absorb 30g per meal." Your body absorbs more than that; the per-meal muscle-building response just plateaus. Larger meals aren't wasted.
- "Plant protein doesn't build muscle." It does — you just need a bit more total and a variety of sources.
The takeaway
Pick a target in the 1.6–2.2 g/kg range, split it across your meals, and be consistent. Protein isn't magic — it's just the one habit that quietly makes everything else you do in the gym actually show up.