Learn fitness · Nutrition

Macros, made simple.

Calories set the direction. Macros decide how you feel, how you train and how much muscle you keep along the way.

6 min readInteractiveUpdated November 2026

The three macros

PProtein · 4 kcal/gBuilds and repairs tissue, the most filling macro.
FFat · 9 kcal/gHormones and cell health. Keep at least about 20% of calories.
CCarbohydrate · 4 kcal/gThe main fuel for hard training. Fills the rest of your intake.

Build your split

Set protein first, keep fat in a healthy range, then let carbohydrate fill the rest. Endurance athletes usually want more carbs, people dieting often want more protein.

Shape a day of eatingExample: 2,400 kcal

Don’t forget fibre and colour

Aim for plenty of vegetables, fruit and whole grains. Fibre keeps you full and supports gut health, and a varied plate covers vitamins and minerals without much thought.

Key takeaways
  • Protein first, fat in range, carbs fill the rest
  • More carbs if you train hard and long
  • Fibre and variety matter as much as the numbers

General information, not medical advice. If you have a health condition, are pregnant, or take medication, check with a professional first. See the medical disclaimer.

Sources
  1. Dietary Guidelines for Americans, 2020–2025: acceptable macronutrient distribution ranges.
  2. Thomas DT et al. Nutrition and athletic performance: joint position statement (ACSM, AND, DC). Med Sci Sports Exerc, 2016.
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