B³ Macro Starter Guide (Evidence-Based Nutrition)

Learn how to set your calories, protein, carbs, and fats the right way


Macros determine how your body looks, not just how much you weigh.
Your calorie intake controls weight change.
Your macro balance controls muscle retention, energy, and hunger.

Step 1 — Set Calories

  • Fat Loss: Body Weight × 10–12

  • Recomposition: Body Weight × 12–14

  • Muscle Gain: Body Weight × 14–16

Step 2 — Set Protein

✔ 0.8–1.1g/lbs. to maintain lean mass in a deficit
(ISSN, 2017)

Step 3 — Set Fats

✔ 20–30% of calories for hormonal health

Step 4 — Carbs

✔ Fill remaining calories
✔ Fuel your training and recovery

Example for 170 lbs. client (Fat Loss)

  • Calories: 1,900

  • Protein: 170g

  • Fat: 60g

  • Carbs: 165g

Perfect for fat loss, recomposition, and lean gains.

"Stop guessing your macros. Dial them in."

Use this science-based macro guide to set up your calories and macros in minutes.

Ready for a plan built just for you?
Apply for B³ Online Coaching and let’s build your blueprint together.