TL;DR
For most adults, protein needs fall between 1.2 and 2.2 g per kg of body weight – depending on your goal. The DGE minimum recommendation of 0.8 g/kg prevents deficiency, but not much more.
- Sedentary, healthy: 1.0–1.2 g/kg
- Athletically active: 1.4–1.8 g/kg
- Muscle building: 1.6–2.2 g/kg
- Dieting (preserving muscle): 1.8–2.4 g/kg
- Age 60+: 1.2–1.6 g/kg
Why Protein Is the Most Important Macronutrient
Carbs and fats provide energy – and in many diets, the two can substitute for each other. Protein is different. It's the only macronutrient the body uses to build muscle fibers, enzymes, hormones, and antibodies.
On a diet, protein has four superpowers:
- It's the most filling of all the macros – more satiety per calorie than fat or carbs
- It protects muscle mass in a calorie deficit, so you actually lose fat
- It burns calories itself – its thermic effect is 20–30%, versus 5–10% for carbs and 0–3% for fats
- It stabilizes blood sugar by digesting more slowly than pure carbs
The Tiers of Protein Needs
Tier 1: 0.8 g/kg – the Minimum Dose
The official recommendation from the German Nutrition Society (DGE) is 0.8 g/kg of body weight. What this number means: the absolute minimum to avoid deficiency symptoms like muscle loss or a weakened immune system – for a sedentary, healthy person.
It isn't "the optimum for a healthy life," but rather "the line below which problems start." This distinction is often misunderstood.
Tier 2: 1.2–1.6 g/kg – the Active Person
As soon as you exercise regularly (even just 2–3 moderate sessions a week), your needs go up. Research from the International Society of Sports Nutrition (ISSN) recommends 1.4–2.0 g/kg for training adults.
What that means in practice:
- 65 kg woman, working out 3x/week → ~80–105 g protein/day
- 80 kg man, working out 3x/week → ~110–145 g protein/day
Tier 3: 1.6–2.2 g/kg – Muscle Building
If you're specifically trying to build muscle, you benefit from the higher end of the range. The meta-analysis by Morton et al. (2018) showed a clear advantage up to 1.6 g/kg – beyond that the added benefit levels off, but there's no harm.
Example: a 75 kg man bulking → 120–165 g protein/day.
Tier 4: 1.8–2.4 g/kg – Dieting While Preserving Muscle
During a calorie deficit, protein becomes even more important, because otherwise the body sacrifices muscle for energy. Helms et al. (2014) recommend 1.8–2.7 g/kg of fat-free mass for training individuals on a diet – pragmatically, 1.8–2.4 g/kg of body weight is a very good range.
Example: a 70 kg woman dieting → 125–170 g protein/day.
Tier 5: Seniors – Higher Needs, Often Low Intake
After age 60, the anabolic response to protein declines ("anabolic resistance"). At the same time, many seniors eat less. This is one of the main causes of sarcopenia (age-related muscle loss).
Current recommendations land at 1.2–1.6 g/kg – combined with strength training to counter muscle loss.
Concrete Gram Targets – a Practical Table
| Weight | Sedentary | Active | Muscle Building | Dieting |
|---|---|---|---|---|
| 50 kg | 50–60 g | 70–90 g | 80–110 g | 90–120 g |
| 60 kg | 60–72 g | 84–108 g | 96–132 g | 108–144 g |
| 70 kg | 70–84 g | 98–126 g | 112–154 g | 126–168 g |
| 80 kg | 80–96 g | 112–144 g | 128–176 g | 144–192 g |
| 90 kg | 90–108 g | 126–162 g | 144–198 g | 162–216 g |
| 100 kg | 100–120 g | 140–180 g | 160–220 g | 180–240 g |
Note: If you're significantly overweight (BMI > 35), base the calculation on your target weight rather than your current weight – otherwise you'll overestimate your needs.
How to Meet Your Needs in Everyday Life
Protein Sources with High Biological Value
| Food | Protein per 100 g | Note |
|---|---|---|
| Chicken breast | 22 g | A versatile classic |
| Low-fat quark | 12 g | Very filling, high in leucine |
| Cottage cheese | 11 g | Convenient and quick |
| Lentils (cooked) | 9 g | Plant-based, filling |
| Eggs | 13 g | Complete amino acid profile |
| Salmon | 20 g | Plus omega-3s |
| Tofu (firm) | 16 g | Plant-based, versatile |
| Skyr / Greek yogurt | 10–12 g | A quick breakfast |
| Whey protein | 75–80 g | Convenient after training |
| Lentils, beans, chickpeas | 7–9 g | Plus fiber |
The 30-Gram Rule
Spread your protein across 3–5 meals with 25–40 g each. Studies show that muscle protein synthesis is maxed out at around 0.4 g/kg per meal – more protein in one sitting offers no added benefit, but isn't harmful either.
Practical meals with 30 g of protein:
- 150 g chicken breast = ~33 g
- 250 g low-fat quark = ~30 g
- 4 large eggs = ~28 g
- 200 g lentils (cooked) + 30 g skimmed milk powder = ~30 g
Vegan / Vegetarian – Is It Harder?
Yes, but doable. Plant proteins often have a somewhat lower biological value (except soy). Three strategies:
- Combine: grains + legumes (rice + beans, pasta + lentils) complement each other's amino acid profiles.
- Bump up your intake slightly: vegans should add +10% to the recommendations to offset the lower absorption.
- Use plant-based protein powders: pea, hemp, or soy protein as a supplement – especially handy after training.
Go to the Vegan Macros Calculator →
Common Mistakes with Protein Needs
Mistake 1: Underestimating Your Intake
Many people think they eat enough protein – but they don't track it. A week of honest weighing often reveals just 50–70 g/day where 120 g were needed.
Mistake 2: Blindly Trusting "High Protein" Labels
"High protein" pudding and "protein bread" often have only 5–10 g more than the standard product – at a 30% higher price. Stick with real food.
Mistake 3: Too Much at Once, Too Little Otherwise
The classic "steak in the evening with 80 g of protein, nothing else" pattern is suboptimal. Better to spread 30 g across 3–4 meals through the day.
Mistake 4: Protein Bars as a Meal
Most bars have 10–15 g of protein – but 200–250 kcal. Per gram of protein, that's often the most expensive and least healthy source.
Conclusion
Protein needs are one of the most important and most misunderstood numbers in nutrition. The DGE recommendation of 0.8 g/kg is a minimum, not an optimum.
Anyone who's active, wants to build or maintain muscle, is on a diet, or is over 60 clearly benefits from 1.2–2.2 g/kg. This range is well researched, safe, and easy to implement – once you know where protein is found and how to spread it out.
Go to the Macro Calculator →
Go to the TDEE Calculator →
High-Protein Foods List →
Sources
- Morton RW et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength (2018)
- Jäger R et al. International Society of Sports Nutrition Position Stand: protein and exercise (2017)
- Helms ER et al. Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation (2014)
- Bauer J et al. Evidence-based recommendations for optimal dietary protein intake in older people (PROT-AGE) (2013)
- Deutsche Gesellschaft für Ernährung – Referenzwerte Protein