Every successful fat-loss approach — keto, intermittent fasting, high protein, you name it — works for one underlying reason: it puts you in a calorie deficit. Understanding how to set one up properly is the single most useful thing you can learn about losing weight. Here's how.

What Is a Calorie Deficit?

A calorie deficit means eating fewer calories than your body burns. When you do this consistently, your body makes up the energy gap by burning stored fat — and you lose weight. It really is that simple at the core.

How to Set Up Your Deficit

• Estimate your maintenance calories — the amount that keeps your weight stable (online calculators give a rough starting point based on your age, size, sex and activity)
• Subtract a moderate amount — a deficit of around 300–500 calories a day is sustainable for most people
• Prioritise protein — keep it high to preserve muscle and stay full
• Track your progress — adjust based on the scale over 2–3 weeks, not day to day

How Big Should Your Deficit Be?

Bigger isn't better. A moderate deficit:

• Is sustainable — you can actually stick to it
• Preserves muscle — extreme deficits burn muscle along with fat
• Avoids burnout — crash diets almost always rebound

Aim for steady fat loss of around 0.5–1kg per week.

The Hardest Part — and the Fix

The challenge isn't understanding the deficit; it's staying in it day after day when you're hungry, busy and tired. This is where pre-portioned meals are a genuine cheat code. Our Lean range (400–550 calories, 30g+ protein) keeps you in a controlled deficit automatically — high protein keeps you full, and the portions are done for you, so you stay on track without counting.

Frequently Asked Questions

Stay in Your Deficit the Easy Way

Let calorie-controlled meals do the hard part. Build your plan today.

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Want to see the Lean range?

Questions? Email shop@mealprep.nz or call 07 572 5700.

General information only, not personalised dietary advice.