How much protein do you actually need to build muscle? (UK guide)

Protein is the one thing everyone knows matters for building muscle — and the one thing almost everyone gets confused about. How much is enough? Is more always better? Do you need expensive powders and shakes?

Here's a straight, no-nonsense guide to how much protein you actually need to build muscle, based on what the evidence broadly agrees on, without the supplement-industry hype.

The simple number to remember

For building muscle, most evidence points to somewhere around 1.6 to 2.2 grams of protein per kilogram of bodyweight per day.

So if you weigh 80kg, that's roughly 130 to 175 grams of protein a day. Aim for the middle of that range and you're in good shape. You don't need to hit a precise number every day — consistency across the week matters more than perfection on any single day.

Do you need more than that?

Generally, no. Once you're eating enough protein to support muscle growth, piling on more doesn't build extra muscle faster — your body can only use so much. Beyond the range above, extra protein mostly just gets used for energy or stored. So there's little point forcing down huge amounts. Hit your target, then focus your effort on training and overall calories.

Do you need protein powder?

No — powder is convenient, not magic. It's just a cheap, easy way to hit your protein target when whole food is a hassle. You can get everything you need from food: chicken, beef, fish, eggs, dairy, and plenty of plant sources like beans, lentils, tofu and soya. Powder is useful if you struggle to eat enough, or need something quick and portable — but it's a tool, not a requirement.

How to actually hit your target

The practical trick is spreading protein across your meals rather than cramming it all into one. Aim for a solid source of protein at each meal — something like 30–40g per meal for most people gets you there without much thought. A few examples of what that looks like:

• A chicken breast: roughly 30–40g
• Three eggs: around 18g
• A tin of tuna: around 25g
• A scoop of whey: around 20–25g
• A tub of Greek yoghurt: around 15–20g

Build meals around a protein source and the numbers take care of themselves.

The bigger picture

Protein matters, but it's one part of the job. To build muscle you also need to train with enough intensity and progression, eat enough total calories to support growth, and recover properly. Nailing protein while ignoring your training or eating far too little overall won't get you far.

That's where having a proper plan helps — one that sets your protein target based on your bodyweight and goal, builds your meals and training around it, and adjusts as you progress. Doing all that by hand is a faff, which is exactly why most people never quite get it right. An AI coach sets and tracks it for you — see what's included.

The bottom line

Aim for around 1.6–2.2g of protein per kg of bodyweight daily, spread across your meals, mostly from whole food with powder as an optional convenience. Hit that consistently, train properly, eat enough overall — and the muscle follows.