How to Adjust Your Macros
as You Lose Weight
The numbers you start with aren't the numbers you'll finish with. Here's how to keep them aligned.
Here's something most macro calculators don't tell you: the numbers you start with aren't the numbers you'll finish with. As you lose weight, your body changes — and so do your macro needs.
This is where a lot of people plateau, quit, or accidentally lose muscle. They keep eating the same macros they set in month one, even though their body is now smaller, lighter, and burning fewer calories.
Here's how to adjust your macros as you lose weight — without overthinking it or changing things too often.
📉 Why Your Macros Change
Three things shift as you lose weight:
Your BMR drops
A smaller body burns fewer calories at rest. If you started at 90kg and are now at 80kg, your basal metabolic rate is lower — meaning your maintenance calories are lower too.
Your TDEE drops
Less body weight means less energy burned for the same activity. Walking a mile at 80kg costs fewer calories than walking a mile at 90kg.
Your training demands may change
If you're training harder or differently, your protein and carb needs shift with it.
The calorie target and macro split that got you from 90kg to 80kg won't necessarily get you from 80kg to 70kg.
The General Rule
A simple starting point: recalculate your maintenance calories every 4–5 kg (or 8–10 lbs) of weight lost.
For most people, that means every 4–8 weeks during active fat loss. Each time, adjust your target based on your new TDEE.
500 cal deficit at 90kg
~15%
of TDEE
500 cal deficit at 70kg
~25%
much harder to sustain
Keeping your deficit relative to your current body — not your starting body — is the difference between sustainable and aggressive.
💪 Protein: The Macro You Protect
Standard range
1.6–2.2g/kg
for people who are strength training
Aggressive fat loss
2.3–3.1g/kg
may further protect lean mass
The research is consistent: protein intake protects lean muscle mass during a deficit. But here's the practical nuance: if you're using total body weight, your protein target will drop as you lose weight. That's usually fine — but some coaches recommend keeping protein fixed at your goal weight, not your current weight, to preserve muscle more aggressively.
The simple version: Keep protein at the higher end of your range (1.8–2.2g/kg of current weight) throughout your diet.
Carbs and Fat: The Macros You Flex
Once protein is set, carbs and fats get the remainder of your calories. As calories drop, you'll have less room for both.
There's no universal "right" split. Some people feel better with more carbs (especially if training hard). Others do better with more fat. The research doesn't strongly favor one over the other for fat loss when protein and calories are matched.
Keep fat at 0.6–1.0g/kg — enough for hormones and satiety
Fill the rest with carbs — especially around training
Adjust based on how you feel — energy, hunger, performance, sleep
🛑 When to Stop Adjusting
At some point, you need to stop chasing the perfect macro split. Here's when:
When you're hitting protein and calories consistently — that's 90% of the equation
When small tweaks aren't changing results — bigger changes are needed, not smaller ones
When you're in maintenance — macros matter less when you're not trying to lose or gain
The best macro split is the one you'll actually follow for months, not the one that looks perfect on a spreadsheet.
💡The Bottom Line
Your macros need to change as your body does. Recalculate your maintenance calories every 4–5 kg lost, keep protein high, and flex carbs and fat based on how you feel.
Don't change things every week. Change them when your body has actually changed.
Targets that adapt as you do
This is exactly where Fadeyy helps. Instead of asking you to recalculate BMR, TDEE, and macro splits every few weeks, Fadeyy's personalized meal plans adapt as your weight and goals change — keeping your protein high and your calories aligned with your current body.
You get the updated targets and the meal ideas. You just eat.
Try Fadeyy→Your first two days are on us.