Why Protein is the Cornerstone of Muscle Growth
Protein is made up of amino acids — the building blocks your body uses to repair and grow muscle tissue after exercise. When you train hard, you create microscopic tears in muscle fibres. Protein provides the raw materials needed to rebuild those fibres stronger and larger than before. Without sufficient protein, all the time you spend training simply won't translate into the gains you're after.
The General Recommendation
Research consistently points to a range of 1.6–2.2 grams of protein per kilogram of body weight per day as optimal for muscle building in people who train regularly. For most active individuals, landing somewhere in the middle of this range is a practical target.
For a person who weighs 75 kg, that means roughly 120–165 g of protein per day. As a rough starting point, aiming for around 2 g per kg of bodyweight is a reliable and easy-to-remember target.
Does Timing Matter?
Protein timing — specifically the idea of an "anabolic window" right after training — is far less critical than total daily intake. That said, spreading your protein across 3–5 meals throughout the day is a sensible approach. This helps maximise muscle protein synthesis and keeps you feeling full and energised.
- Aim for roughly 25–40 g of protein per meal
- Include a protein source in your pre- and post-workout meals
- A protein-rich snack before bed (such as cottage cheese or Greek yoghurt) may support overnight recovery
Best High-Protein Food Sources
| Food | Protein per 100g | Notes |
|---|---|---|
| Chicken breast (cooked) | ~31 g | Lean, versatile staple |
| Canned tuna | ~25 g | Affordable, convenient |
| Eggs | ~13 g (whole) | Complete amino acid profile |
| Greek yoghurt (0% fat) | ~10 g | Good for snacks |
| Lentils (cooked) | ~9 g | Great plant-based option |
| Whey protein powder | ~75–80 g | Useful when hitting targets is difficult |
| Tofu (firm) | ~8 g | Plant-based, pairs well with many dishes |
Do You Need Protein Supplements?
Protein powders (whey, casein, plant-based blends) are a convenient tool, not a requirement. If you can consistently hit your protein targets through whole foods alone, supplements offer no added advantage. However, they're a practical and cost-effective option when life gets busy, appetite is low, or you're cutting calories.
Common Mistakes to Avoid
- Eating almost all protein in one meal: Your body can only use so much at once for muscle synthesis — spread it out.
- Relying solely on shakes: Whole foods provide vitamins, minerals, and fibre that shakes can't replicate.
- Ignoring total calories: Even with perfect protein intake, you need to be in an appropriate calorie range (surplus for muscle gain, deficit for fat loss).
- Not adjusting as you gain weight: As your body weight increases, so should your protein target.
The Bottom Line
Hit your daily protein target consistently, eat a variety of quality sources, and pair it with a structured training programme. That combination, sustained over time, is what drives real, lasting muscle growth.