How Much Protein Do You Actually Need?

Protein is the most important macronutrient for body composition. It builds and repairs muscle tissue, supports immune function, produces hormones and enzymes, and has a higher thermic effect than carbohydrates or fat — meaning your body burns more calories digesting it. Getting protein right is the foundation of any effective nutrition plan.

The recommended dietary allowance (RDA) of 0.8 g/kg per day represents the minimum needed to prevent deficiency in sedentary adults — not the optimal amount for active people. For anyone exercising regularly or trying to improve body composition, research consistently recommends significantly higher intakes.

What the Research Says

The International Society of Sports Nutrition (ISSN) Position Stand (2017) recommends 1.4–2.0 g/kg/day for most exercising adults, with higher targets for fat loss phases (2.0–2.4 g/kg) and muscle building (1.6–2.2 g/kg). A 2018 meta-analysis by Morton et al. of 49 studies found that protein supplementation significantly increased muscle gain, with the benefit plateauing at approximately 1.62 g/kg/day under normal conditions.

Protein and Fat Loss: Why More Protein Helps

During a calorie deficit, adequate protein intake (2.0–2.4 g/kg) preserves lean mass and preferentially burns fat. Higher protein also reduces hunger through multiple mechanisms: it increases satiety hormones (GLP-1, PYY), reduces the hunger hormone ghrelin, and promotes stable blood sugar. Studies consistently show that high-protein dieters lose more fat, preserve more muscle, and adhere to their diets more easily.

Practical Tips for Hitting Your Protein Target

• Build each meal around a protein source: 150–200g chicken, fish, or meat provides 30–46g protein
• Add Greek yogurt, cottage cheese, or eggs as protein-dense snacks
• Use protein powder as a convenient top-up if needed — 1 scoop adds 20–25g
• Track your intake for a few weeks until you understand the protein content of your typical foods
• Distribute protein evenly across 3–5 meals (20–40g each) rather than loading most into one meal