Set protein first: the macro order that actually works

Most macro advice starts with percentages — 40/30/30, 50/25/25 — and that is the wrong end of the problem. Percentages scale with calories, so the moment you cut calories, your protein target falls. That is precisely backwards: protein requirements are driven by your bodyweight and training, not by how much you happen to be eating this month.

Consider a 75 kg lifter on 3,000 kcal using a 30% protein split: that is 225 g, comfortably adequate. Cut to 1,900 kcal for a diet phase and the same 30% gives 143 g — a 36% reduction in protein at the exact moment muscle is most at risk.

The fix is to order the decisions properly. First, protein in grams per kilogram of bodyweight: 1.6 g/kg is the minimum for preserving muscle in a deficit, and 2.0–2.2 g/kg is a sensible working target for anyone lifting. Second, fat, with a floor of about 0.6–0.8 g/kg to protect hormone production and fat-soluble vitamin absorption. Third, carbohydrate takes whatever calories remain, and that is where your training fuel comes from.

Worked through: 75 kg on 2,100 kcal gives 150 g protein (600 kcal), 60 g fat (540 kcal), leaving 960 kcal or 240 g of carbohydrate. Notice the resulting percentages — roughly 29/46/26 — look nothing like a textbook split, and are better for the goal.

Two refinements matter more than fine-tuning the ratios. Get 25–35 g of fibre, because satiety is what makes a deficit survivable. And distribute protein across three or four meals of 30–40 g rather than one large serving, which supports muscle protein synthesis more evenly through the day.

Finally, precision has limits. Landing within 5–10 g of your protein and fat targets and within 20 g on carbohydrate is enough. Consistency across weeks beats accuracy on any single day.