Why Protein Matters

Protein is the building block of muscle, skin, enzymes, and hormones. Unlike fats and carbohydrates, the body does not store protein effectively, so a consistent daily intake is required. The RDA (0.8 g/kg) prevents deficiency, but optimal intake for active adults is substantially higher.

Protein and Fat Loss

In a caloric deficit, higher protein preserves lean muscle mass — so the weight you lose is fat, not muscle. Protein is also the most satiating macronutrient, helping you stay full longer between meals. This calculator boosts targets by 20% when the goal is fat loss.

Distribution Throughout the Day

Muscle protein synthesis responds best to 25–40 g of protein every 3–4 hours. Spreading your target across 3–5 meals gives better results than one giant protein-heavy meal, because the body uses excess protein in a single sitting largely for energy.