How to Calculate Protein Needs
What is Protein Needs?
Protein requirements vary by age, sex, activity, and health condition. Calculating needs ensures adequate intake for muscle and immune function.
Step-by-Step Guide
- 1Base: 0.8 g/kg/day for sedentary adults
- 2Athletes: 1.2-2.0 g/kg/day
- 3Renal disease: reduced; hepatic disease: careful adjustment
Worked Examples
Input
70 kg athlete in strength training
Result
Protein needs = 85-140 g/day
1.2-2.0 g/kg
Common Mistakes to Avoid
- ✕Prescribing high protein to sedentary patients
- ✕Neglecting renal function (can worsen kidney disease)
Frequently Asked Questions
Is more protein always better?
No, excess without exercise is wasted. Optimal is adequate intake plus resistance training.
Do protein sources matter?
Complete proteins (containing all amino acids) better; plant proteins lower quality unless combined.
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