The Protein Protocol
The recommended daily allowance (RDA) of 0.8g per kg of bodyweight is the minimum required to prevent malnutrition. It is not the optimal amount for building muscle, preserving lean mass during fat loss, or maximising satiety.
How Much Do You Actually Need?
If you are actively lifting weights or engaging in rigorous physical activity, the scientific consensus strongly leans towards a higher intake. A landmark 2018 meta-analysis by Morton et al. concluded that muscle protein synthesis maxes out at approximately 1.62g per kilogram of body weight per day.
The Concrete Numbers
- Sedentary adult: 1.0g - 1.2g / kg
- Active / Endurance: 1.2g - 1.4g / kg
- Building Muscle (Hypertrophy): 1.6g - 2.2g / kg
- Fat Loss (Preserving Muscle): 2.0g - 2.4g / kg
Common Mistakes
The most frequent error is extremely asymmetrical protein distribution. Eating a piece of toast for breakfast (5g protein), a small salad for lunch (10g protein), and a massive 400g steak for dinner (100g protein) is suboptimal.
Muscle protein synthesis (MPS) operates on a threshold system. You need roughly 30g of high-quality protein containing about 3g of leucine to trigger the process. Once triggered, the machinery is "on" for a few hours. Excess protein in that single sitting is oxidised for energy, not used to build extra muscle.
| Meal | Poor Distribution | Optimal Distribution |
|---|---|---|
| Breakfast | 5g | 40g |
| Lunch | 15g | 40g |
| Dinner | 100g | 40g |
Frequently Asked Questions
Does high protein damage kidneys?
In healthy individuals, no. Multiple long-term studies have shown that high protein intakes do not negatively impact renal function in subjects without pre-existing kidney disease.
Do I need to eat immediately after a workout?
The "anabolic window" is much wider than the old 30-minute myth. While having protein post-workout is good practice, total daily intake and even distribution matter significantly more. Read more in our Anabolic Window guide.
Next Steps
Stop guessing your requirements. Use our Protein Calculator to get your exact daily target based on your lean body mass and goals. Ensure you pair your high protein intake with adequate fibre to maintain optimal digestive health.