This is your complete protein reference — from the fundamentals of BMR and TDEE to protein timing, supplementation, and goal-specific strategies. Bookmark it.
The Foundation: BMR and TDEE
Before you can optimize protein, you need to understand your energy baseline. BMR (Basal Metabolic Rate) is the calories you burn at rest. TDEE (Total Daily Energy Expenditure) is your real-world daily calorie burn, accounting for activity.
We calculate both using the Mifflin-St Jeor equation — the most accurate widely-used BMR formula. Your TDEE is then derived by multiplying your BMR by an activity factor (1.2–1.9). This gives you your maintenance calories, from which you adjust up or down for your goal.
Use our protein calculator to get your personalized BMR, TDEE, and protein range in one step.
Protein Ranges by Activity and Goal
| Scenario | Protein Range | Rationale |
|---|---|---|
| Sedentary, maintenance | 0.8–1.0g/kg | RDA minimum |
| Lightly active | 1.0–1.3g/kg | Supports light exercise recovery |
| Moderate training | 1.3–1.6g/kg | Supports 3–5x/week training |
| Active, fat loss | 1.6–2.0g/kg | Muscle preservation + satiety |
| Athlete, muscle gain | 1.8–2.2g/kg | Maximal MPS stimulus |
Calorie-Based Protein Targets
An alternative (and useful cross-check) is to calculate protein as a percentage of total daily calories. Since protein provides 4 kcal/g:
- 20% of calories: 2,000 kcal diet → 100g protein
- 25% of calories: 2,000 kcal diet → 125g protein
- 30% of calories: 2,000 kcal diet → 150g protein
Our calculator shows both approaches — use the weight-based figure as your primary target, and the calorie percentage as a macro-tracking sanity check.
Protein Timing
Distribute protein across 3–5 meals daily. Each meal triggers a distinct muscle protein synthesis spike. Key timing notes:
- 20–40g per meal is optimal for MPS in most individuals
- No need for protein immediately post-workout — the window extends to 2 hours
- Pre-sleep protein (casein or cottage cheese) may support overnight muscle repair
- Breakfast protein reduces overall daily calorie intake by improving satiety
Protein Quality: Complete vs Incomplete
Complete proteins contain all 9 essential amino acids. Leucine, in particular, is the primary trigger for muscle protein synthesis. Animal proteins score higher here — especially whey, eggs, and dairy. Plant proteins can be combined (rice + beans, hummus + pita) to achieve complete profiles. Soy protein is a notable plant exception — complete and comparable to whey in muscle-building effects.
Protein Supplements Guide
- Whey protein: Fast-absorbing, highest leucine of any supplement, ideal post-workout. Whey concentrate is cost-effective; isolate is lower in lactose.
- Casein: Slow-absorbing (~7 hrs), ideal before sleep for sustained amino acid delivery.
- Pea + rice protein blend: Best plant option. Combined DIAAS score approaches whey quality.
- Creatine: Not protein, but enhances muscle protein synthesis and training performance — a valuable addition.
When Protein Isn't Enough
Remember: protein builds muscle — but training provides the stimulus. Without progressive resistance training, excess protein is simply oxidized for energy. The optimal formula is:
Right Calories + Right Protein + Progressive Training = Results
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