Read this disclaimer first. This isn't medical advice. Calorie deficits aren't appropriate for everyone — pregnant or breastfeeding people, people with a history of disordered eating, people with certain medical conditions, and people on medications that interact with food shouldn't change their eating without consulting a qualified professional. If you're in any of those categories, treat this article as background reading, not a plan.

Now: assuming you're not, let's talk about what makes a deficit week work without it being miserable. The Dietrack meal planner for weight loss is the app version of this; the manual version is below.

What "deficit" actually means

A calorie deficit means eating less than your body burns over time — typically 250–500 kcal/day below your maintenance calorie level. That's it. There are no magic foods, magic timing windows, or magic protocols. The deficit does the work; the planning makes it sustainable.

A 250 kcal/day deficit is about 0.25 kg of fat per week, on paper. In practice it's slower (water shifts, glycogen, the messy reality). A 500 kcal/day deficit is about 0.5 kg/week — which is the upper end of "sustainable" for most people.

Bigger deficits aren't faster long-term. They're faster short-term and then you stop, which is the same as never starting.

The 4 levers (volume, protein, fat, satisfaction)

When you cut calories, the trade-off is between calories and satiety. The four levers that keep meals satisfying at lower calories:

Lever 1 — Volume

More food, fewer calories per gram. Vegetables, broths, fruits, popcorn, salads. They take up stomach space; the brain reads "full".

The high-volume meals: a giant salad with a small protein. Soup as a starter. Roasted vegetables as a side. The whole high-volume eating philosophy is its own article, and it's a useful lever in any deficit.

Lever 2 — Protein

Protein is the most filling macro. In a deficit, bias toward 1.8–2.2g/kg body weight (see how to set your macros for the math). Greek yogurt, eggs, chicken thigh, lentils, tinned tuna, cottage cheese. The proteins that don't require a project to prepare.

Lever 3 — Fat

Fat is calorie-dense (9 kcal/g vs 4 for protein and carbs), so cutting it cuts calories fast. But don't go below 0.6g/kg. Hormones, satiety, and the basic enjoyment of eating depend on some fat. Drop the cooking oil, not the avocado.

Lever 4 — Satisfaction

The lever everyone forgets. A meal you actually like at 600 kcal beats a meal you don't at 450 kcal — because the second one leads to snacking. Plan meals you want to eat, not meals you've been told to eat.

A week of meals (with substitutions)

A working template for ~1800 kcal/day. Adjust portions for your target.

| Day | Breakfast | Lunch | Dinner | Snack | |---|---|---|---|---| | Mon | Greek yogurt + berries + honey (350) | Chicken-and-rice bowl (500) | Salmon + roasted veg (550) | Apple + peanut butter (250) | | Tue | Two eggs + toast + tomato (400) | Lentil soup + bread (450) | Chicken stir-fry + rice (550) | Cottage cheese (200) | | Wed | Oats + banana + walnuts (400) | Tuna salad + crackers (450) | Pasta with vegetables (550) | Yogurt + honey (250) | | Thu | Greek yogurt + granola (400) | Chicken wrap (500) | Lentil curry + rice (500) | Fruit (200) | | Fri | Eggs + smoked salmon + toast (450) | Chicken salad bowl (500) | Pizza night (~700) | Skip — pizza budget | | Sat | Brunch out (~700) | Light snack (250) | Roast chicken + salad (500) | (covered) | | Sun | Oats + fruit (400) | Big salad with protein (500) | Stir-fry from leftovers (500) | Yogurt (200) |

Substitutions:

  • Vegetarian: swap chicken for tofu/lentils; salmon for halloumi or tempeh.
  • No dairy: oat yogurt; coconut yogurt; pumpkin seeds for cottage cheese.
  • Higher carb: more rice/oats, less fat in cooking.
  • Lower carb: more vegetables, more fat (avocado/olive oil), less rice/pasta.

Hunger, not just calories

In a deficit, you'll feel some hunger. That's the deal — your body is asking for more, and you're choosing to eat less. The job of the plan is to make hunger manageable, not absent.

What helps:

  • Protein at every meal. Including breakfast.
  • Fibre at every meal. Vegetables, lentils, whole grains.
  • Liquid before food. Water, sparkling water, tea. Not as a trick; as a normal habit.
  • Sleep. Under-rested people eat more. Sleep is a deficit lever.
  • Don't skip meals. Skipping leads to over-eating later, almost always.

When to take a break

After 12–16 weeks in a deficit, take a 1–2 week diet break — eat at maintenance. This isn't cheating; it's biology. Long deficits down-regulate metabolism, hunger hormones rise, and adherence falls off a cliff. A break resets and lets you do another 12-week cycle.

If you've been at it for 8 weeks and have stopped losing weight: adjust calories down by 100 kcal, or take a break first then adjust. Don't crank the deficit harder; the body adapts.

FAQ

How fast should I lose weight?

0.25–0.5 kg/week is the sustainable range. Faster usually means losing more muscle alongside fat, and is harder to maintain.

What if I'm hungry all the time?

Two checks: (1) Are you hitting protein? (2) Are you hitting volume (vegetables)? Most "always hungry" deficits fail on one of these. Adjust before assuming the calorie level is wrong.

Can I drink alcohol in a deficit?

You can — it just costs calories that don't satiate (alcohol is empty in the satiety sense). One drink is fine; budget it. Three drinks is the night that derails the week.

Is this safe long-term?

Indefinitely sustained large deficits aren't healthy. The cycle approach (12-week diet, 1–2 week break, repeat or maintain) is sustainable. If you're cycling forever, that's also a sign to revisit goals — sometimes "maintain at a slightly heavier weight than you wanted" is a happier life than "always 4kg from goal".

For a worked example of an actual week, see what a sustainable weight-loss week of eating actually looks like.