Protein Intake for Muscle Gain: How Much Do You Really Need?

Getting your protein intake for muscle gain right is one of the simplest changes that makes a real difference. Many people eat less than they need. Here’s how much to aim for, how to spread it out and where to get it.

Why protein matters for muscle

Protein provides the building blocks your body uses to repair and build muscle after training. Lifting weights is the signal to grow. Protein is the material. Without enough of it, you’ll still get some benefit from training, but you’ll leave progress on the table.

Protein also helps you feel full, which is a big help if you’re trying to lose fat at the same time. It takes more energy to digest than carbs or fat, and a protein-rich meal tends to keep hunger away for longer, so snacking becomes easier to control.

Your body can’t store protein the way it stores carbs and fat, so you need a steady supply every day. That’s why the daily total and how you spread it both matter.

Protein intake per kg of bodyweight

Research on protein intake for muscle gain commonly points to around 1.6g of protein per kg of bodyweight per day as a level where most people get the benefit, with some benefiting from up to about 2.2g per kg. The higher end is especially useful when you’re in a calorie deficit, because it helps protect the muscle you already have.

The UK government reference intake for adults is lower, at around 0.75g per kg. That figure is designed to prevent deficiency in the general population, not to support muscle building in people who lift weights.

Worked examples

• 60kg person: about 96g a day at 1.6g/kg, up to about 132g at 2.2g/kg.
• 70kg person: about 112g a day at 1.6g/kg, up to about 154g at 2.2g/kg.
• 80kg person: about 128g a day at 1.6g/kg, up to about 176g at 2.2g/kg.

If you carry a lot of body fat, base your target on your goal weight rather than your current weight, otherwise the number can get unrealistically high. Our free calorie and macro calculator gives you a starting protein target alongside your calories.

Protein intake for muscle gain while losing weight

When you eat less than you burn, your body is more likely to break down muscle for energy. Keeping protein high, towards the 2g per kg mark, along with regular strength training, sends a strong signal to hold on to it. That’s how people manage to lose fat and build some muscle at the same time, especially beginners and people returning to training. We explain the process in how to lose fat and build muscle.

Protein intake for women

The numbers per kg are the same for women as for men. In practice, many women eat well below these targets, so it’s worth tracking your intake for a few days to see where you are. Building muscle doesn’t make women bulky. It makes them stronger and leaner, and it matters even more after 40. Our guide to building muscle after 40 covers why.

Spread it over your meals

Rather than one huge protein meal at dinner, aim for roughly 25-40g per meal across three or four meals. For most people that looks like:

• Breakfast: eggs on toast with Greek yoghurt, or overnight oats made with skyr.
• Lunch: a chicken, tuna or tofu salad or wrap.
• Dinner: a palm-to-hand-sized portion of meat, fish or a plant protein, with vegetables and carbs.
• Snack if needed: cottage cheese, a pint of milk or a protein yoghurt.

UK-friendly protein sources

Approximate protein per typical portion (it varies by brand and cooking):

• Chicken breast, 150g cooked: around 45g
• Tin of tuna, drained: around 25g
• Salmon fillet: around 25g
• 5% beef mince, 125g: around 25g
• Greek yoghurt or skyr, 150g pot: around 15g
• Cottage cheese, half a 300g tub: around 15g
• Two large eggs: around 12-13g
• Firm tofu, 100g: around 12-15g
• Cooked lentils or beans, half a tin: around 10g
• Milk, 250ml: around 8-9g

Do you need protein powder?

No. Protein powder is a convenience, not a necessity. A scoop typically gives around 20-25g and can be handy when you’re short on time or struggling to hit your number. If you can get there with normal food, that’s fine too. See our nutrition coaching for how we build simple meal plans around your week.

Check with your GP first if you have kidney disease or reduced kidney function, or have been told to limit protein. The same applies if you’re pregnant, have diabetes or another medical condition that affects your diet.

Putting it together

A simple way to start is to track what you eat for three normal days and add up your protein. Most people find one meal, often breakfast, is very low. Fix that meal first, then build from there.

Protein on its own won’t build muscle. You need a progressive strength training plan, enough sleep and consistency over months. But once those are in place, hitting your protein target most days is what turns training into visible results. If you want someone to set your numbers and keep you accountable, our weight loss coaching includes a food plan with clear calorie and protein targets.

Want this coached 1-to-1? Get a food plan with your protein target worked out for you. Book a free consultation at our Archway studio.

Frequently asked questions

How much protein do I need to build muscle?

Research commonly points to around 1.6g of protein per kg of bodyweight per day, with some people benefiting from up to about 2.2g per kg, especially in a calorie deficit.

How much protein should I eat per meal?

Around 25-40g per meal across three or four meals works well for most people. It is easier to hit your daily target this way than with one large meal.

Can I build muscle while losing weight?

Yes, especially if you are new to strength training. Keep protein high, lift weights two or three times a week and keep your calorie deficit modest.

Do I need protein shakes to build muscle?

No. Protein powder is a convenient option but not a requirement. You can hit your target with foods like chicken, fish, eggs, Greek yoghurt, tofu and lentils.

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