Protein is one of the three basic macronutrients, essential for building and repairing tissue, producing enzymes and hormones, and supporting immunity. An adequate protein intake is crucial both for active people and for those leading a sedentary lifestyle. How much do you really need?
The Baseline Norm
For an average, low-activity adult, the recommended minimum is 0.8 g of protein per kilogram of body weight per day. This is a value that prevents deficiencies but is not necessarily optimal for health and body composition.
Needs Versus Activity and Goal
The more you move, the more protein you need:
- 0.8 g/kg — low-activity people, the physiological minimum
- 1.2–1.6 g/kg — active people, recreational exercisers
- 1.6–2.2 g/kg — strength athletes, building muscle mass
- 2.0–2.4 g/kg — weight loss while preserving muscle
- up to 1.2 g/kg — older people (sarcopenia prevention)
Calculation Example
A man weighing 80 kg, training with weights, aiming to build muscle:
- We take 1.8 g/kg as the goal
- 80 kg × 1.8 g = 144 g of protein per day
- Spread over 4 meals: 144 / 4 = about 36 g per meal
Spreading protein over 3–4 meals throughout the day promotes better use for muscle synthesis than consuming it all in one meal.
The Best Protein Sources
- Chicken breast — about 23 g of protein per 100 g
- Eggs — about 6.5 g per egg
- Low-fat cottage cheese — about 18 g per 100 g
- Lentils and beans — 8–9 g per 100 g when cooked
- Fish (salmon, cod) — 18–22 g per 100 g
- Tofu — about 8 g per 100 g
Protein in a Plant-Based Diet
People on a vegan diet should combine different sources of plant protein (legumes with grains) to obtain a complete amino acid profile. It is also worth slightly increasing the total intake, since plant protein is sometimes less well absorbed than animal protein.
Is Excess Protein Harmful
In healthy people, a moderately high protein intake (up to about 2 g/kg) is safe and does not strain the kidneys. The myth of protein's harmfulness mainly concerns people with existing kidney disease, who should limit its amount under medical supervision.
Remember
The norms given are general values for healthy adults. In cases of kidney or liver disease, or during pregnancy, the requirement is set individually with a doctor or dietitian. Protein is best obtained from varied, natural sources.
Want to find out your daily protein dose? Enter your body weight and activity level in our protein needs calculator on liczbnik.pl and it will calculate the goal in grams.