How much protein do you need per day? A plain guide by body weight

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Protein comes up in almost every conversation about food, fitness and ageing, and the numbers you hear vary widely. Here is what the main reference figures actually say, how to turn them into meals, and when to be careful. This is general information, not medical advice; your own needs depend on your health, age and activity, and a doctor or registered dietitian can advise you personally.

The baseline: 0.8 g per kg

The Recommended Dietary Allowance (RDA) used in the US and Canada sets protein for healthy adults at 0.8 grams per kilogram of body weight per day. European reference values are similar. For a 60kg adult that is about 48g a day; for 80kg, about 64g. It is worth knowing what this figure is. The RDA was set to cover the minimum needed to avoid losing body protein in nearly all healthy adults. It is a floor for health, not a target for building muscle or a ceiling.

Higher ranges for active people

People who train regularly, especially with weights, are often advised to eat more. The International Society of Sports Nutrition's position stand puts daily intake for most exercising people at 1.4 to 2.0 g per kg. Other expert reviews have suggested somewhat lower ranges, so treat these as general guidance rather than precise rules. Many older adults are also encouraged by researchers to aim above the RDA to help keep muscle, which is worth discussing with a doctor.

Turning grams into food

Rough protein content varies by product, so check labels where you can. Good sources include:

Animal sources: chicken, fish, eggs, lean meat, Greek yoghurt, cottage cheese and milk.
Plant sources: tofu, tempeh, lentils, chickpeas, beans, edamame, peas, seitan, nuts and seeds.
Grains: oats, wholemeal bread and quinoa add smaller amounts that add up over a day.

You usually do not need supplements. Protein powders are a convenience, not a requirement; food also gives you fibre, vitamins and minerals.

Spreading it across the day

Rather than one large serving at dinner, many people find it easier to include a protein source at each meal. A practical approach:

Breakfast: eggs, yoghurt, tofu scramble or oats made with milk or soya milk.
Lunch: a portion of fish, chicken, beans or tofu with your carbohydrate and vegetables.
Dinner: the same principle; a palm-sized portion is a common visual guide.
Snacks: nuts, edamame, a glass of milk or a yoghurt.

Spreading intake also helps if you are trying to feel full on fewer calories, since protein is filling.

Plant-based eaters

Vegetarians and vegans can meet their protein needs comfortably. Two pointers:

Eat a variety of plant proteins over the day; beans with grains is the classic combination, but they do not have to be in the same meal.
Soya foods are one of the most protein-dense plant options, and lentils and chickpeas are cheap staples.

When to be careful

Kidney disease: people with chronic kidney disease are often advised to limit protein. If you have kidney problems, diabetes affecting the kidneys, or any condition you are being treated for, talk to your doctor before raising your intake.
Pregnancy, older age, illness and recovery from surgery can change needs; ask a professional.
More is not always better: very high intakes crowd out other foods, and extra protein beyond your needs does not automatically become muscle without training.
Hydration: drink enough water, especially if you increase protein substantially.

A simple way to start

Multiply your weight in kg by 0.8 to see the baseline.
If you train regularly, look at the higher range as a general guide.
Note what you eat for a few days and see roughly where you land.
Adjust with real food first.

How do you fit protein into your meals? Share your favourite high-protein dishes or ask a question in the comments.