Protein for fat loss: how much and why it matters

How much you actually need

The UK reference nutrient intake is 0.75 g per kg a day, but that is set to prevent deficiency in the general population, not to protect muscle during a diet. For people who train, research consistently supports around 1.6 to 2.2 g per kg a day, with the upper end most useful when you are lean or in a bigger deficit.

• 70 kg person: about 110 to 155 g a day.
• 85 kg person: about 135 to 185 g a day.
• 100 kg person: about 160 to 220 g a day.

If you are carrying a lot of body fat, basing your target on current weight gives numbers that are hard to hit and not necessary. Use your goal weight instead, or roughly your height in cm as grams of protein (about 170 g for someone 170 cm tall), which lands in a sensible range. Our main guide on how much protein you need covers other situations.

Spread it across the day

Your body cannot store protein the way it stores fat or carbohydrate, so spreading it out makes sense. Three or four meals with roughly 25 to 40 g each covers most people. A lot of us eat a little at breakfast, a bit at lunch and a mountain at dinner, so shifting some of that to the morning is often the easiest fix.

Our high protein breakfasts guide has ideas that take less than five minutes. Greek style yoghurt with berries and oats, eggs on toast with a side of cottage cheese, or overnight oats made with milk and a scoop of protein powder all get you to around 30 g without much effort.

Easy ways to hit your target

You do not need expensive products. Every UK supermarket stocks what you need, including own-brand versions that cost far less. Rough protein figures:

• Chicken breast (raw): around 23 to 24 g per 100 g.
• Tinned tuna (drained): around 25 g per 100 g.
• 0% fat Greek style yoghurt: around 10 g per 100 g.
• Cottage cheese: around 10 to 12 g per 100 g.
• Eggs: about 6 to 7 g each.
• Lean beef mince (5% fat): around 20 to 21 g per 100 g raw.
• Cooked lentils or beans: roughly 7 to 9 g per 100 g, with plenty of fibre too.
• Tofu: roughly 12 to 15 g per 100 g, depending on firmness.

Protein shakes are a convenience, not a requirement. They are useful if you are busy, or plant-based and struggling to hit your number with food alone. Our guide to budget high protein shopping has a full basket list.

What 150 g of protein looks like in a day

Numbers on a screen can feel abstract, so here is a plain example for someone aiming at roughly 150 g. It is not a meal plan, just a picture of how the target stacks up across normal food.

• Breakfast: 200 g of 0% Greek style yoghurt with berries and a handful of oats, around 25 g.
• Lunch: a wrap with a tin of tuna, salad and a little light mayo, around 35 g.
• Afternoon: a pint of semi-skimmed milk or a protein shake, around 20 to 25 g.
• Dinner: chilli made with 150 g of lean beef mince and kidney beans, served with rice, around 40 g.
• Evening: a small tub of cottage cheese or two boiled eggs, around 12 to 20 g.

Swap the animal foods for tofu, tempeh, lentils, soya milk and a plant protein powder and the same structure works for vegetarians and vegans, with a little more planning. Our guide to vegetarian and vegan protein has the details.

Common worries

Is high protein bad for your kidneys? In healthy adults, research has not shown intakes in the ranges above to harm kidney function. If you have kidney disease or are being monitored for it, speak to your GP before changing your diet.

Will it make me bulky? No. Protein supports the muscle you have and helps you build more if you are training, but gaining a lot of muscle takes years of hard work and usually a calorie surplus. In a diet, you are protecting what you already have.

Can I eat too much? Protein still contains calories, 4 kcal per gram, the same as carbohydrate. Beyond about 2.2 g per kg the extra benefit is small, so it makes more sense to spend the rest of your calories on carbs for training and fats for health.

Protein works best with lifting

Protein on its own helps, but it is the combination with resistance training that really protects muscle. If you are not lifting yet, our guide to strength training for fat loss explains why it matters and how often to do it.

Consistency beats perfection here. Hitting your protein target on five or six days out of seven is plenty. If you want help turning a target like this into a habit, Lycan Strength offers nutrition and accountability coaching alongside its classes.