Key takeaways
- Weight loss comes down to one rule: eat fewer calories than you burn — a moderate 10–20% deficit, not a crash diet.
- Keep protein high (~1.6–2.2 g/kg) and keep strength training, so the weight you lose is fat, not muscle.
- Aim for ~0.5–1% of bodyweight per week and judge progress on the multi-week trend, not the daily scale.
- Plateaus are normal — as you get lighter you burn less, so the plan has to adjust with you.
- The best diet is the one you can actually sustain. No food is banned; protein and whole foods do the heavy lifting.
Almost everything you have read about weight loss is noise on top of one simple rule: to lose weight, you have to eat fewer calories than you burn. Get that right — sustainably, while protecting your muscle — and the weight comes off and stays off. This is the pillar guide; each section links to a deeper dive.
The one rule: a moderate calorie deficit
Every diet that works — low-carb, high-protein, fasting, "clean eating" — works for the same reason: it puts you in a calorie deficit. You do not need a specific diet; you need a deficit you can actually hold. What a calorie deficit really is explains the mechanism in full.
- Find your maintenance calories with the TDEE calculator.
- Set a moderate deficit — about 10–20% below maintenance, often 300–600 kcal a day — with the calorie target calculator.
- Bigger is not better: aggressive deficits cost you muscle, energy and adherence, and they rebound. How many calories to lose weight gives real numbers.
Calorie Target Calculator
- Maintenance (TDEE)
- 2740 kcal
- Daily deficit / surplus
- -548 kcal
Estimated change: -0.5 kg per week.
Protein and strength training protect your result
A deficit makes you lose weight; protein and lifting decide whether that weight is fat or muscle. Keep protein around 1.6–2.2 g per kg of bodyweight (check yours with the protein calculator) and keep strength training two to four times a week. That is the difference between losing fat and simply getting smaller and softer — the full picture is in how to lose fat, not just weight.
Track the trend, not the day
Your weight bounces daily with water, food and salt. What matters is the weekly average trend. Weigh in consistently, look at the multi-week direction, and only change your calories when the trend genuinely stalls for two to three weeks.
Plateaus are part of the plan
As you get lighter you burn fewer calories, so a deficit that worked at the start eventually becomes your new maintenance. That is not failure — it is physiology, and it means the plan has to adjust with you. How to break a weight-loss plateau walks through it. This is exactly where a coach who recalibrates your plan every week beats a fixed app.
Make it last
The best diet is the one you can keep doing:
- No food is banned — build meals around protein and whole foods, and leave room for the things you love.
- Do not rely on motivation; rely on a plan that fits your real week.
- Sleep and stress matter — both quietly drive hunger and adherence.
For specific situations, go deeper with our guides on losing belly fat, weight loss for women, weight loss in menopause and how much cardio you actually need.
If you want this built around your life and adjusted as your body changes, that is exactly what our coaching and the Method do — or start with the free Physique Blueprint to see your numbers and your first plan.
This is general information, not medical advice. If you have a medical condition, take medication that affects your weight or appetite, or are pregnant, talk to your GP before making big changes.
Sources & further reading
- Healthy weight — NHS
- Physical activity guidelines for adults aged 19 to 64 — NHS
- ISSN Position Stand: Protein and Exercise (Jäger et al., 2017) — J. Int. Soc. Sports Nutrition
Citations are provided for transparency. This is general information, not medical advice — always consult a qualified professional about your own circumstances.