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The Complete Protein Guide

Protein is the most important macro for body composition. Here's how much you need and where to get it.

Last updated: January 2025

Why protein matters most

Protein builds and repairs muscle, supports immune function, makes enzymes and hormones, and keeps you full longer than carbs or fat. It also has the highest thermic effect — your body burns about 20–30% of protein's calories just digesting it. For anyone trying to lose fat or build muscle, protein is the priority.

How much do you need?

GoalProtein per kg
General health (sedentary)0.8–1.0 g
Active / fat loss1.2–1.6 g
Building muscle1.6–2.2 g

Use the protein calculator for a target based on your weight and goal.

Best protein sources

  • Animal: chicken breast, turkey, lean beef, fish, eggs, Greek yogurt, cottage cheese, whey protein
  • Plant: tofu, tempeh, edamame, lentils, chickpeas, black beans, seitan, pea protein

Animal proteins are "complete" (all essential amino acids). Plant eaters can easily get everything by combining a variety of sources across the day.

Timing and distribution

Total daily protein matters most, but spreading it across 3–4 meals of 25–40 g each maximizes muscle protein synthesis. A protein-rich breakfast also improves fullness and appetite control for the rest of the day.

Practical tips

  • Anchor every meal around a protein source.
  • Keep quick options on hand: Greek yogurt, eggs, jerky, protein powder.
  • If you train, include protein within a few hours of your workout.

Frequently asked questions

How much protein do I need to build muscle?

Research supports 1.6–2.2 g of protein per kg of body weight per day for building muscle. Going higher offers little additional benefit for most people.

Can I eat too much protein?

For healthy individuals, high-protein diets are safe. There's no strong evidence that high protein harms healthy kidneys. Those with kidney disease should consult a doctor.

Calculate your numbers

Put this into practice — get your personalized calorie and macro targets free.