How to actually lose 1 lb a week (without hating breakfast)
The 500 kcal/day deficit math is real — but flat-cutting your maintenance ignores 60 years of nutrition research. Here's the version that holds.
Osobní zkušenost — není lékařská rada
Toto je zkušenost jednoho člověka, nikoli zaručený výsledek. Volya není zdravotnické zařízení a tyto výsledky nejsou typické ani zaručené. Při chronických onemocněních, těhotenství, po operaci nebo při lécích se před změnou stravy nebo tréninku poraď s lékařem.
The textbook answer is everywhere: 1 lb of fat ≈ 3,500 kcal, so a 500 kcal/day deficit drops a pound a week. It's mathematically correct, behaviourally naïve, and is why most people quit by week three.
Why flat-500 is the wrong default
The 500 kcal number was reverse-engineered from one 1958 paper that estimated body-fat caloric density and assumed 100% efficiency. Real metabolism adapts: when you cut hard, your body lowers non-exercise activity thermogenesis (you fidget less, take fewer stairs), and your basal rate drops 5-10% within 4 weeks. Result: a flat 500 cut on month 2 produces ~300 kcal of actual deficit, and the scale stalls right when you're least motivated.
The percentage-of-maintenance method
Calculate your maintenance (Mifflin-St Jeor + activity multiplier), then cut 15-20% of THAT. For most adults:
- 1,400 kcal maintenance → 1,200 target (200 kcal deficit, slow but sustainable)
- 2,000 kcal maintenance → 1,700 target (300 kcal deficit, ~0.6 lb/week)
- 2,800 kcal maintenance → 2,300 target (500 kcal deficit, ~1 lb/week)
So the textbook 500 IS the right cut — but only for people with high maintenance to begin with. For everyone smaller, percentage cutting prevents the metabolic adaptation spiral.
What to cut, in order
Most weight-loss advice says "eat less, move more" and stops there. The order of cuts matters:
- Liquid sugar first. Soda, sweetened coffee, juice. ~300 kcal/day for the typical person, zero satiety value.
- Fat from low-protein meals. A bagel with butter is 400 kcal, 8 g protein. Swap to two eggs + whole-grain toast: same kcal, 24 g protein, way more satiety.
- Carbs from dinner. Last meal of the day doesn't need 80 g of pasta. Trim by 30-50 g and add a fist of vegetables.
- NEVER cut protein. Aim for ≥1.6 g per kg bodyweight (more if active). Below that you lose muscle, slow your metabolism, and rebound.
How Volya runs this for you
Tell the AI coach your goal ("1 lb per week") and it calculates YOUR maintenance from age, sex, weight, activity, and recent food log. The day's recipe suggestions auto-target your deficit and protein floor. The photo-of-plate scanner shows you the kcal of every meal in 2 seconds — so the deficit happens without spreadsheet math.
The calorie deficit landing goes deeper on the satiety strategy. The /learn/calories-to-lose-1lb-week page has the formulas if you want them.