Calorie Deficit: The Complete 2026 Guide to Losing Weight Safely and Keeping It Off
You have probably heard that losing weight comes down to “eating less and moving more.” That is technically true, but it misses all the detail that actually matters — the detail that explains why some people lose weight steadily and others spin their wheels for months.
The science behind all of it is one concept: the calorie deficit.
This guide covers everything. What a calorie deficit really is. How to calculate yours properly using the most validated formula available. How large a deficit you actually need. How to eat without feeling miserable. Why progress stalls. And what to do when it does.
No fluff. No fad diet language. Just the information you need, explained the way a good dietitian would explain it over a long appointment.
What Is a Calorie Deficit?
A calorie deficit is the state your body enters when it burns more calories than it receives from food and drink.
A calorie — properly called a kilocalorie (kcal) — is a unit of energy. Your body uses energy constantly, every second of every day, to keep your heart pumping, your lungs breathing, your temperature stable, your cells repairing, and your muscles moving. The energy for all of that comes from the food you eat.
When the energy you eat matches the energy you burn, your weight stays the same. This is called energy balance.
When you eat more than you burn, the surplus is stored — mainly as body fat. This is a calorie surplus, and it leads to weight gain over time.
When you eat less than you burn, your body needs to find the extra energy somewhere. It pulls it from stored reserves — primarily body fat. That is a calorie deficit, and it is what causes fat loss.
Here is the core equation:
Calorie Deficit = Calories Burned (TDEE) minus Calories Consumed
If that number is positive, you are in a deficit. If it is zero, you are at maintenance. If it is negative, you are in a surplus.
This sounds simple. And the principle is simple. But the execution is where most people struggle — because your burn rate is not fixed, your body adapts, and not all deficits are equal. All of that is covered below.
KEY FACT: No diet, no supplement, and no exercise programme can make you lose fat unless it first creates a calorie deficit. This is not controversial. It is supported by decades of controlled metabolic research.
How a Calorie Deficit Actually Burns Body Fat
When your body runs short on incoming energy, it does not simply slow down and wait. It has built-in reserves and it uses them.
The first thing your body taps into is glycogen — a form of carbohydrate stored in your muscles and liver. Each gram of glycogen holds about three grams of water alongside it. This is why weight loss in the first week or two is often dramatic: you are mostly losing glycogen and its attached water, not fat. The scale drops fast, but that is not true fat loss — learn how fat loss actually works
or calculate your real fat loss to track progress more accurately.
After glycogen stores are depleted, your body increasingly turns to adipose tissue — your stored body fat. Fat cells release triglycerides into the bloodstream, which are broken down and used as fuel. This is the fat loss you are actually after.
However, body composition during a deficit is not all fat. Without enough protein and the right exercise, some lean muscle can be lost too. This is why the quality of the deficit matters enormously, not just the size.
Some rough benchmarks that are widely cited and useful to understand:
• 1 pound (0.45 kg) of body fat contains approximately 3,500 kcal of stored energy
• 1 kg of body fat contains approximately 7,700 kcal
• A 500 kcal daily deficit × 7 days = 3,500 kcal = roughly 0.45 kg / 1 lb of fat per week
• A 300 kcal daily deficit = roughly 0.3 kg of fat loss per week
These numbers are estimates, not guarantees. Your actual fat loss depends on your starting composition, metabolic rate, hormones, sleep quality, and how accurately you track intake. But they give you a working framework.
How to Calculate Your Calorie Deficit — Step by Step
Calculating a calorie deficit properly takes two things: knowing how many calories your body burns daily, and knowing how many you are eating. Here is the step-by-step method used by registered dietitians.
STEP 1 — Calculate Your Basal Metabolic Rate (BMR)
Your BMR is the number of calories your body burns at complete rest — just to breathe, circulate blood, regulate temperature, and keep your organs functioning. It accounts for 60 to 70 percent of all the calories you burn in a day.
The most validated formula for calculating BMR in modern adults is the Mifflin-St Jeor equation, published in the American Journal of Clinical Nutrition in 1990 and still used as the clinical gold standard today.
For men:
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) + 5
For women:
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) − 161
Worked example — a 32-year-old woman, 66 kg, 163 cm tall:
BMR = (10 × 66) + (6.25 × 163) − (5 × 32) − 161
BMR = 660 + 1018.75 − 160 − 161
BMR = 1,357.75 kcal/day
This woman burns approximately 1,358 kcal per day just existing, at rest.
STEP 2 — Multiply by Your Activity Factor to Get TDEE
Your Total Daily Energy Expenditure (TDEE) accounts for everything: your resting metabolism, the energy it takes to digest food (the thermic effect of food), and all your physical movement throughout the day.
Multiply your BMR by the factor that matches your typical week:
• Sedentary (desk job, little to no exercise): × 1.2
• Lightly active (light exercise 1–3 days per week): × 1.375
• Moderately active (exercise 3–5 days per week): × 1.55
• Very active (hard exercise 6–7 days per week): × 1.725
• Extra active (physical job plus intense daily training): × 1.9
Continuing the example above: 1,358 × 1.375 = 1,867 kcal/day TDEE
This is the number of calories she needs to eat every day to maintain her current weight with light activity.
STEP 3 — Subtract Your Chosen Deficit
For safe, sustainable fat loss, subtract 300 to 500 kcal from your TDEE:
• 300 kcal deficit: 1,867 − 300 = 1,567 kcal/day (slower, very sustainable)
• 500 kcal deficit: 1,867 − 500 = 1,367 kcal/day (standard rate, ~0.5 kg/week)
That daily calorie target is your goal.
STEP 4 — Recalculate Every 3 to 4 Weeks
This is the step most guides skip — and it is the most important one.
Every kilogram you lose reduces your TDEE. Your body is lighter, so it burns fewer calories to move and maintain itself. If you set your target at 1,367 and never adjust it, your deficit will gradually shrink and eventually disappear entirely. That is not failure. That is just physics. Recalculate your BMR and TDEE monthly, or every 3 to 5 kg lost.
HONEST TIP: Most people overestimate their activity level. If you work out 4 times a week but sit at a desk the rest of the time, use “lightly active,” not “moderately active.” Overestimating by just one activity level adds 150–200 kcal to your perceived TDEE, which can wipe out most of your deficit.
How Much of a Calorie Deficit Do You Really Need?
The most common mistake people make when starting a diet is cutting calories too aggressively. They assume bigger deficit equals faster results. Sometimes it does — briefly. But the body pushes back.
Here is what different deficit sizes actually mean in practice:
200 to 300 kcal/day deficit
Expected loss: roughly 0.2 kg (0.4 lb) per week
Best for: people close to their goal weight, maintenance transition, body recomposition
Risk: very low — this is barely noticeable
300 to 500 kcal/day deficit (THE RECOMMENDED SWEET SPOT)
Expected loss: roughly 0.3 to 0.5 kg (0.65 to 1 lb) per week
Best for: the vast majority of people — sustainable, effective, preserves muscle
Risk: low
500 to 750 kcal/day deficit
Expected loss: roughly 0.5 to 0.75 kg (1 to 1.5 lb) per week
Best for: people who are significantly overweight and have more fat mass to draw from
Risk: moderate — hunger, fatigue, and motivation challenges increase
750 to 1,000 kcal/day deficit
Expected loss: roughly 0.75 to 1 kg (1.5 to 2 lb) per week
Best for: medically supervised programmes only
Risk: high — muscle loss, nutrient gaps, hormonal disruption, metabolic adaptation
Over 1,000 kcal/day deficit (crash dieting)
Expected loss: unpredictable and diminishing
Best for: nobody
Risk: very high — severe metabolic adaptation, muscle wasting, nutrient deficiency, gallstones, rebound weight gain
IMPORTANT FLOOR RULES:
Women should not fall below 1,200 kcal/day without medical supervision.
Men should not fall below 1,500 kcal/day without medical supervision.
These are minimums to prevent nutritional deficiency — not targets to aim for.
If the maths of your deficit pushes you below these floors, your target weight timeline is too aggressive. Extend it.
The TDEE Activity Level Table in Practice
To make activity levels concrete, here are real-world examples for a 35-year-old man, 80 kg, 178 cm tall (BMR approximately 1,873 kcal):
Activity level | TDEE | 500 kcal deficit target
Sedentary | 2,248 | 1,748 kcal/day
Light | 2,575 | 2,075 kcal/day
Moderate | 2,903 | 2,403 kcal/day
Very active | 3,231 | 2,731 kcal/day
Notice how much activity level changes the picture. The same man on moderate activity has a maintenance of 655 calories more than on sedentary. Getting this wrong is the single biggest calculation error people make.
How to Eat in a Calorie Deficit Without Feeling Starved
The number one reason people abandon a calorie deficit is hunger. And hunger is very often not a willpower problem — it is a food choice problem. The right foods let you feel full and satisfied on far fewer calories. Here is exactly how to do it.
Lead Every Meal with Protein
Protein is the most filling macronutrient. It suppresses ghrelin — the hormone that drives hunger — more powerfully than either fat or carbohydrate. It also has the highest thermic effect of any macronutrient: your body burns roughly 25 to 30 percent of protein calories just in the process of digesting it. And, critically, high protein intake during a deficit is the single most important factor in preserving lean muscle — making it a key part of any effective weight loss breakfast ideas.
The target: aim for 1.6 to 2.2 grams of protein per kilogram of body weight per day.
For a 75 kg person, that is 120 to 165 grams of protein per day. Spread across three to four meals, that is a very achievable 35 to 50 grams per meal.
Best high-protein, lower-calorie sources: chicken breast, white fish (cod, haddock, tilapia), salmon, Greek yoghurt (0% fat), cottage cheese, eggs and egg whites, tofu, tempeh, lentils, chickpeas, edamame.
Use Volume Eating to Fill Your Plate
Volume eating means choosing foods that take up a lot of physical space in your stomach while delivering few calories. The concept is simple: a full stomach sends satiety signals to your brain regardless of how many calories are in it.
Compare: 100 grams of raw broccoli contains just 34 kcal. 100 grams of crisps (chips) contains around 530 kcal. You would need to eat over 15 times as much broccoli by weight to match the calories in a small bag of crisps.
The best volume foods: all leafy greens (spinach, kale, rocket), cucumber, celery, courgette (zucchini), tomatoes, peppers, mushrooms, broccoli, cauliflower, berries, watermelon, apples, oranges. Clear soups and broths are also excellent — they are filling, warming, and very low in calories.
Prioritise Fibre at Every Meal
Dietary fibre slows gastric emptying — meaning food sits in your stomach longer, keeping you full well past your meal. It also feeds beneficial gut bacteria, which influences hunger hormones and mood.
The average adult consumes only 15 to 17 grams of fibre per day. The USDA recommends 25 to 38 grams. Getting to that range dramatically reduces hunger throughout the day.
Best fibre sources: oats, barley, lentils, black beans, kidney beans, raspberries, avocado, pears, flaxseed, chia seeds, sweet potato, and most vegetables.
Drink Water Before Meals
Multiple studies have shown that drinking 400 to 500 ml of water 20 to 30 minutes before a meal reduces calorie intake at that meal by an average of 70 to 90 kcal. Over the course of a day, staying well-hydrated also prevents the brain from confusing mild thirst with hunger — a phenomenon that is very real and very common.
Sparkling water, black coffee, and unsweetened herbal teas are all calorie-free and effective appetite tools.
Eat Slowly and Deliberately
It takes roughly 20 minutes for fullness signals from your stomach to reach your brain. Eating quickly allows you to consume far more than you need before that signal arrives. Studies show that slow eaters consume significantly fewer calories at a meal and feel just as satisfied. Put your fork down between bites. Chew thoroughly. Eat without screens.
The Best Foods for a Calorie Deficit Diet
Building your diet around these categories makes hitting your calorie target much easier, because they are filling, nutritious, and lower in calorie density:
Lean proteins (already covered above) — keep hunger low and muscle preserved.
Non-starchy vegetables — as much as you want. Broccoli, spinach, kale, green beans, asparagus, cabbage, and all leafy greens deliver massive volume with minimal calories and a wide range of micronutrients.
Whole fruits — berry varieties (strawberries, blueberries, raspberries) are particularly good. High in fibre, relatively low in sugar, and very filling per calorie.
Whole grains over refined grains — oats, brown rice, quinoa, barley, and wholegrain bread digest more slowly than their white/refined equivalents, providing longer satiety and better blood sugar stability.
Legumes — beans, lentils, and chickpeas are the most underrated calorie-deficit food. One cup of cooked lentils delivers about 18 grams of protein, 15 grams of fibre, and under 230 kcal. Exceptional value.
Low-fat dairy — Greek yoghurt, cottage cheese, skyr, and low-fat milk are high in protein, filling, and relatively calorie-controlled.
Eggs — one of the most complete foods available. Two large eggs deliver 12 grams of protein and 140 kcal. Studies show egg breakfasts reduce calorie intake at lunch significantly compared to cereal breakfasts.
Healthy fats in moderation — olive oil, nuts, seeds, and avocado are calorie-dense, so portions matter. But they are deeply satiating and nutritionally critical. Do not eliminate fat; just measure it.
Simple Calorie-Saving Swaps (works in real life):
Instead of a creamy coffee shop latte — try an Americano with a splash of milk. Save 150 to 200 kcal.
Instead of white rice — try cauliflower rice for half the portion. Save 150 to 200 kcal.
Instead of salad dressing from a bottle — try lemon juice, balsamic vinegar, or a tablespoon of olive oil. Save 100 to 150 kcal.
Instead of a bag of crisps — try air-popped popcorn or rice cakes. Save 200 to 300 kcal.
Instead of a full-fat yoghurt with granola — try plain Greek yoghurt with berries. Save 200 to 300 kcal.
Instead of frying in oil — try a dry pan or air fryer. Save 100 kcal per tablespoon of oil avoided.
Seven Calorie Deficit Mistakes That Kill Progress
Most people who “try calorie deficit and it didn’t work” are actually making one or more of these errors:
Mistake 1: Underestimating Portions
Research consistently shows that people underreport their calorie intake by an average of 20 to 40 percent. That is not dishonesty — it is the genuine difficulty of estimating food without measuring. A tablespoon of peanut butter looks the same whether it is 16 grams or 40 grams. A handful of nuts can range from 100 to 250 kcal.
The solution is simple but requires a habit shift: use a kitchen scale, at least for the first few weeks, to calibrate your eye. Once you have weighed foods enough times, your estimates become much more accurate.
Mistake 2: Forgetting Liquid Calories
A single glass of orange juice: 110 kcal. A large latte with whole milk: 190 kcal. A standard glass of wine: 120 to 140 kcal. Two craft beers: 360 to 440 kcal. These add up to easily 500 to 700 extra kcal on a social evening — enough to completely erase a week’s deficit in one night.
Alcohol is especially problematic because it contains 7 kcal per gram (more than carbohydrate at 4 kcal/gram) and it is prioritised by the liver for metabolism — meaning fat burning is effectively paused while your body is clearing alcohol.
Mistake 3: Eating Back All Exercise Calories
Fitness trackers and cardio machines overestimate calorie burn by 15 to 40 percent on average. Eating back every calorie a treadmill tells you that you burned is a recipe for eliminating your deficit entirely. Use only about 50 percent of tracked exercise calories as a buffer, if any.
Mistake 4: The All-or-Nothing Mindset
One restaurant meal does not ruin a week of deficit. A birthday cake slice does not ruin a month. The damage comes from the all-or-nothing decision that follows: “I’ve already blown it today, so I might as well eat everything.” That thought pattern, not the original food, is what causes genuine setbacks.
Weekly calorie average is what drives results — not whether any individual day was perfect. One high-calorie day surrounded by days on target has very little real impact.
Mistake 5: Not Adjusting as Weight Drops
If you start at 90 kg and your TDEE is 2,400 kcal, a 500 kcal deficit puts you at 1,900 kcal/day. After losing 8 kg, your TDEE may now be 2,200 kcal. Your “1,900 kcal/day” is now only a 300 kcal deficit. After losing 15 kg, it might only be a 100 kcal deficit. The scale slows — not because your body is broken, but because the maths changed.
Recalculate. Adjust. Keep going.
Mistake 6: Sleeping Too Little
This one is not optional. Sleep deprivation — consistently getting fewer than 7 hours per night — raises ghrelin (the hunger hormone) by up to 24 percent and lowers leptin (the fullness hormone). The result is increased hunger, stronger food cravings (particularly for calorie-dense and sweet foods), and reduced willpower when food is in front of you. You can be eating in a perfect deficit on paper and sabotage it entirely through chronic poor sleep.
Mistake 7: Ignoring Stress
High chronic stress elevates cortisol, which increases appetite and promotes fat storage — particularly around the abdomen. Cortisol also causes water retention that can mask fat loss on the scale for weeks at a time. Stress management is not a soft lifestyle topic — it is a genuine physiological weight loss variable.
Why the Scale Stops Moving — and How to Break Through Plateaus
A weight loss plateau is when the scale stops changing for two or more weeks despite consistent adherence to your calorie deficit. It is one of the most demoralising experiences in a weight loss journey. It is also completely normal and expected, and it has a clear scientific explanation.
Why Plateaus Happen
Adaptive thermogenesis: Your body has evolved to resist starvation. When it detects a prolonged calorie deficit, it responds by reducing your TDEE beyond what your lower body weight alone explains — by up to 15 percent according to some research. It becomes more fuel-efficient in every process.
Reduced NEAT: Non-Exercise Activity Thermogenesis covers all the movement in your day that is not deliberate exercise — fidgeting, posture, walking to the kitchen, standing. In a calorie deficit, NEAT drops spontaneously and often unconsciously. You sit more, move less, fidget less, all without noticing.
Lower body weight burns fewer calories: As covered above — your body simply weighs less and requires less energy.
Water retention masking fat loss: Stress, a high-sodium meal, hormonal fluctuations, and starting a new exercise programme can all cause temporary water retention that makes the scale appear to stall even when fat loss is occurring underneath.
How to Break Through
First, confirm you actually have a plateau and not a measurement issue. Weigh yourself at the same time every morning after using the bathroom, calculate a 7-day average, and compare week-on-week averages. Daily fluctuations of 1 to 2 kg are completely normal and meaningless.
If it is a genuine plateau after 3 to 4 weeks:
Recalculate and reduce your calorie target slightly — by 100 to 150 kcal. A small reduction rather than a dramatic cut.
Take a diet break of 1 to 2 weeks at maintenance calories. Research shows brief diet breaks partially reverse adaptive thermogenesis and improve long-term adherence. This is not giving up — it is strategic.
Increase your protein intake if it has been on the lower end of the range.
Add or change resistance training. Lifting weights adds muscle mass, which raises your BMR over time, making fat loss easier for every future week.
Reassess sleep and stress — not as an afterthought but as active variables in your weight loss equation.
Measure body composition in addition to weight. If your waist is shrinking and clothes fit better, fat loss is happening. The scale may be staying still due to muscle gain or water retention while actual fat is going down.
Can You Build Muscle in a Calorie Deficit?
Yes — and this is called body recomposition.
Gaining muscle while losing fat simultaneously is most achievable under specific conditions, and it is most common in three groups: complete beginners to resistance training (they respond strongly to any stimulus), people returning after a significant break (muscle memory allows faster regrowth), and people who are significantly overweight (they have large enough fat reserves to fuel muscle protein synthesis).
For body recomposition to occur, you need:
1. High protein intake — at least 1.8 to 2.2 grams per kilogram of body weight per day. This provides the amino acids required for muscle protein synthesis.
2. Consistent progressive resistance training — lifting weights, or equivalent bodyweight training, 3 to 4 times per week. Progressive overload (doing slightly more each week) is what stimulates muscle growth.
3. A small, not aggressive, deficit — 200 to 400 kcal maximum. Larger deficits make muscle building progressively harder.
4. Adequate sleep — 7 to 9 hours per night. The majority of muscle protein synthesis occurs during deep sleep. Chronically short sleep reduces anabolic hormone output and essentially prevents muscle building regardless of training.
For experienced lifters with low body fat, true simultaneous muscle gain and fat loss becomes very difficult. In that case, a dedicated “cut” — a period of calorie deficit focused on fat loss while maintaining muscle — is typically more efficient.
Calorie Deficit for Women vs. Men — Key Differences
Men and women respond to calorie deficits in meaningfully different ways, and ignoring this leads to unnecessary frustration.
Men typically have higher muscle mass and lower body fat percentage at the same weight and height. Because muscle tissue burns more calories at rest than fat tissue, men generally have a higher TDEE and can sustain a larger absolute deficit while staying above the minimum intake floor.
Women typically have lower TDEE due to differences in muscle mass, body size, and hormonal profile. This means the practical calorie range between “maintenance” and “unhealthy minimum” is often narrower. A 500 kcal deficit may push some smaller women dangerously close to the 1,200 kcal floor, making a 300 to 350 kcal deficit more appropriate.
The menstrual cycle significantly affects weight, hunger, and performance. In the follicular phase (days 1 to 14), insulin sensitivity is better and exercise performance tends to be higher — a good time for slightly more aggressive deficits or harder training. In the luteal phase (days 15 to 28), progesterone increases appetite, cravings intensify, and the body retains more water. Scale weight commonly increases by 1 to 3 kg in this phase despite ongoing fat loss. This is hormonal and temporary. Don’t panic.
Peri-menopausal and menopausal women often find fat loss harder due to declining oestrogen, which increases abdominal fat deposition and can reduce BMR. The response to this is not a bigger deficit — it is more resistance training and carefully maintained protein intake.
How Long Does It Take to See Results?
Real timeline expectations matter. Most people quit not because the method is wrong but because they expected faster results and interpreted normal progress as failure.
Week 1 to 2: Scale drops sharply, often 1 to 3 kg. Almost all of this is glycogen and water loss, not fat. It is real and it feels motivating — but it is not a rate that continues.
Week 2 to 6: True fat loss begins. At a 500 kcal daily deficit, expect the scale to move roughly 0.3 to 0.5 kg per week on average. There will be days it goes up. There will be weeks it does not move. The average trend over 4 weeks is what matters.
Week 6 to 12: The first visible changes appear. Clothes begin to feel different. Energy levels often improve. Strength may increase. The scale is less dramatic but more reliable.
3 to 6 months: Significant, visible transformation for most people. At a moderate 0.5 kg/week rate, 3 months = 6 kg, 6 months = 12 kg. These are meaningful changes in body composition that show in the mirror and in health markers.
The lesson: slow is not failing. Slow is sustainable. Every person who lost a significant amount of weight and kept it off did it slowly.
Frequently Asked Questions
WHAT IS A CALORIE DEFICIT?
A calorie deficit is when you consume fewer calories from food and drink than your body burns through daily functions and physical activity. Your body then uses stored body fat (and sometimes glycogen and muscle) to make up the energy difference, leading to fat loss and weight reduction over time.
HOW MANY CALORIES SHOULD I DEFICIT TO LOSE WEIGHT?
For most adults, a deficit of 300 to 500 calories per day is the recommended range. This produces around 0.3 to 0.5 kg (0.65 to 1 lb) of fat loss per week — a rate that is sustainable, preserves muscle, and does not trigger severe metabolic adaptation.
HOW DO I CALCULATE MY CALORIE DEFICIT?
1. Calculate your BMR using the Mifflin-St Jeor equation.
2. Multiply by your activity factor (1.2 to 1.9) to get your TDEE.
3. Subtract 300 to 500 kcal from your TDEE to set your daily calorie goal.
4. Recalculate every 3 to 4 weeks as your weight changes.
IS 1,200 CALORIES A DAY TOO LOW?
For most women, 1,200 kcal per day is the physiological minimum — not a target or a healthy diet. Eating at or below this level without medical supervision risks nutrient deficiencies, muscle loss, hormonal disruption, hair thinning, extreme fatigue, and metabolic adaptation that makes long-term weight maintenance significantly harder.
WHY AM I NOT LOSING WEIGHT IN A CALORIE DEFICIT?
The most common reasons are: (1) underestimating calorie intake — most people underreport by 20 to 40 percent; (2) TDEE has dropped as body weight has decreased; (3) water retention from stress, hormones, or increased exercise; (4) sleep deprivation raising hunger hormones; or (5) overestimating activity level in the original calculation. Use a kitchen scale for 2 weeks and recalculate your TDEE before concluding the method is not working.
HOW LONG DOES IT TAKE TO LOSE WEIGHT IN A CALORIE DEFICIT?
At a 500 kcal daily deficit, you can expect to lose approximately 0.5 kg (1 lb) per week after the initial water weight drop in week one. Visible physical changes typically appear after 4 to 8 weeks of consistent adherence. Most people see meaningful, significant change within 3 to 6 months.
CAN YOU BUILD MUSCLE IN A CALORIE DEFICIT?
Yes, but it requires high protein intake (1.8 to 2.2 g/kg body weight), consistent progressive resistance training, adequate sleep, and a modest deficit (not more than 300 to 400 kcal). This is called body recomposition and is most effective for beginners and people returning to training after a break.
WHAT IS A SAFE CALORIE DEFICIT?
A safe calorie deficit is generally considered to be 300 to 500 kcal below your TDEE for most healthy adults. This keeps total daily intake above the minimum floor (1,200 kcal for women, 1,500 kcal for men), preserves lean muscle, avoids metabolic adaptation, and is achievable long-term without medical supervision.
DOES IT MATTER WHAT YOU EAT IN A CALORIE DEFICIT?
Yes, significantly. Two people eating the same number of calories will have completely different experiences depending on the quality of those calories. High-protein, high-fibre, nutrient-dense foods reduce hunger dramatically compared to processed, low-fibre foods at the same calorie count. Food quality also determines whether you are getting adequate vitamins, minerals, and macronutrients while in a deficit.
