How Much Protein Do You Really Need Each Day?

Note: This article provides general information. Protein targets require individual assessment in childhood, pregnancy, breastfeeding, chronic kidney or liver disease, cancer treatment, wounds, eating disorders, oedema, or rapid weight change.

The baseline calculation: body weight × requirement

EFSA sets the population reference intake for healthy adults at 0.83 grams of protein per kilogram per day. For a healthy adult weighing 70 kg, that works out to about 58 grams. This reference is intended to cover the baseline needs of most people; it is not automatically the optimal target for building muscle, preserving muscle in older age, or recovering from illness.

The weight used in the calculation also matters. Simply multiplying current weight may be misleading in marked oedema, very low body weight, or obesity. A dietitian or physician may instead choose a reference or adjusted weight.

Figure 1Example daily protein calculations at different body weights

Weight	0.83 g/kg	1.2 g/kg	1.6 g/kg
50 kg	42 g	60 g	80 g
60 kg	50 g	72 g	96 g
70 kg	58 g	84 g	112 g
80 kg	66 g	96 g	128 g
90 kg	75 g	108 g	144 g
100 kg	83 g	120 g	160 g

The 1.2 and 1.6 g/kg columns are calculation examples, not personal prescriptions. The appropriate multiplier depends on age, activity, goals, and health status.

When might protein needs increase?

A higher requirement is not only about building more muscle. With age, muscle may respond less strongly to protein; regular exercise creates demands for repair and adaptation; illness or inadequate energy intake may increase tissue breakdown. The appropriate range, however, is not the same in each situation.

Healthy adultsEFSA's 0.83 g/kg/day is a population reference for healthy adults. It is not automatically the ideal number for every goal.
Older ageESPEN recommends at least 1.0 g/kg/day; 1.0–1.2 g/kg/day is commonly used in healthy older adults. Illness or malnutrition risk may change the target.
Regular exerciseA range of 1.4–2.0 g/kg/day may be used for endurance and resistance exercise. Not everyone needs the upper end.
Illness and recoveryNeeds may rise with surgery, wounds, cancer, or acute and chronic illness; diagnosis, treatment, energy intake, and kidney function must be considered together.

During weight loss, a higher protein intake may help preserve lean tissue, particularly alongside resistance exercise. Protein does not replace adequate energy, exercise, sleep, or overall dietary quality.

Meal distribution may matter alongside the daily total

The claim that the body can use only 20–30 grams of protein in one meal is inaccurate. Dietary protein is digested and used across different tissues, although a single meal cannot stimulate muscle protein synthesis without limit. For people who exercise and for older adults, spreading protein more evenly across three or four main eating occasions can be practical.

Exercise research often examines roughly 0.25–0.40 g/kg per meal. These are not rigid thresholds that everyone must reach at every meal. The first priority is the daily target; distribution can then be adapted to appetite, schedule, and eating pattern.

Figure 2The same daily total, two different meal patterns

Back-loaded

Total: 84 g

10 g

20 g

54 g

More evenly spread

Total: 84 g

28 g

This visual uses 1.2 g/kg for a 70 kg adult as an example. A more even distribution is studied particularly in relation to muscle protein synthesis; it does not by itself guarantee more muscle or faster weight loss.

Protein does not come only from meat

The daily total comes from many animal and plant foods. A predominantly plant-based diet can provide enough protein. What matters is adequate energy and quantity, dietary variety, and meals that are sustainable in real life. Different plant proteins do not have to be ‘combined’ in the same dish.

Milk, yoghurt, and cheese

Portion size and a product's fat and salt content should be considered within the whole diet.

Eggs, fish, poultry, and meat

These provide different vitamins and minerals alongside protein; processed products are not nutritionally identical.

Legumes and soy foods

They provide fibre as well as protein. Tofu and tempeh are useful plant-based options.

Grains, nuts, and seeds

They contribute to the daily total alone or alongside other foods.

Protein powder is not essential. If the target can be met with food, a supplement offers no automatic advantage; it may simply be convenient when time, appetite, or portability is an issue. Product quality and individual health still require consideration.

More protein is not always better

In a large meta-analysis of resistance-training studies, intakes above roughly 1.6 g/kg/day did not produce clear additional gains in fat-free mass or strength. This is not a safety upper limit; it is an approximate point beyond which more protein did not yield more benefit under the studied conditions.

Very high targets may raise food costs and leave less room for fibre-rich foods, whole grains, fruit, vegetables, or healthy fats. Eating above one's requirement does not compensate for poor overall dietary quality.

Chronic kidney disease requires separate consideration. KDIGO suggests maintaining about 0.8 g/kg/day in adults with CKD stages G3–G5 and avoiding high intakes above 1.3 g/kg/day in adults at risk of progression. This does not mean that healthy people should start a low-protein diet on their own.

How should you think about your own target?

Start with context. Are you using the healthy-adult reference, accounting for older age or regular exercise, or managing a clinical condition?
Use the appropriate weight. With oedema, obesity, or markedly low weight, ask a professional which body weight should be used.
Spread it through the day. Distribute the daily total realistically across main meals rather than leaving most of it for dinner.
Look at the whole plate. Consider the protein target alongside fibre, fruit and vegetable variety, energy balance, and enjoyment of food.

You can use the site's protein-needs calculator for an initial estimate. Its result is not a diagnosis or an individualized treatment plan.

Open the protein-needs calculator →

Take-home message

A protein target is not one universally correct number; it is a range chosen for your context.

For a healthy adult, 0.83 g/kg/day is a useful starting reference. Older age, regular exercise, energy restriction, or illness may raise the target, while kidney disease calls for a different plan. Meeting an appropriate daily total, spreading it across several meals, and protecting overall diet quality matters more than chasing the highest possible number.