Why Crash Diets Backfire
Crash diets create extreme deficits that produce fast early loss followed by high rates of abandonment and regain.
2 September 2026Read →
How fat loss actually works — energy balance, plateaus, regain, measurement and the numbers behind realistic expectations.
Crash diets create extreme deficits that produce fast early loss followed by high rates of abandonment and regain.
Water weight is fluid held in tissue and the gut, and it fluctuates far faster and further than fat ever does.
Chronic stress influences weight mostly through behaviour — appetite, food choice, sleep and activity — rather than through cortisol di
Short sleep raises appetite hormones, reduces satiety signalling and measurably increases next-day calorie intake.
Resting metabolic rate declines modestly with age, mostly through muscle loss rather than a mysterious slowdown.
BMI is a population screening tool, body fat percentage is hard to measure accurately at home, and waist circumference is cheap and inf
Individual differences in body size, muscle mass, activity, gut microbiome, sleep and adherence all shift how a given intake plays out.
Weight loss supplements range from mildly useful fibres to entirely inert blends, and the category's average effect size is small.
Ultra-processed foods are industrially formulated products engineered for palatability, convenience and shelf life.
Carbohydrates are neither uniquely fattening nor uniquely necessary; the type and total intake matter far more than the category.
Intermittent fasting restricts eating to a window of hours or days rather than restricting food types.
Total intake dominates, but meal timing influences appetite, adherence and post-meal glucose in ways worth knowing.
Weight loss includes water, glycogen, gut contents and muscle; fat loss is the part you actually want.
Protein is the most satiating macronutrient and the one most protective of muscle during a deficit.
Regain is the return of lost weight after a diet ends, and it is the most common outcome of weight loss attempts.
Recomposition is simultaneous fat loss and muscle gain, which changes body shape while the scale barely moves.
A sustainable deficit feels like mild, manageable hunger before meals and slightly lower training energy — not constant deprivation.
A plateau is a period of several weeks with no change in the weekly weight average despite an apparently unchanged plan.
Subcutaneous fat sits under the skin; visceral fat surrounds the organs and is far more closely linked to metabolic risk.
Set point theory describes the body's tendency to defend a familiar weight through appetite and energy expenditure changes.
Body weight swings by one to two kilos across a single day from hydration, glycogen, sodium, hormones and digestive contents.
Most clinical guidance points to 0.5 to 1% of body weight a week as the rate that preserves muscle and stays sustainable.
Energy balance is the difference between the calories you take in and the calories you burn, and a sustained negative balance is the on
A good goal is specific, time-bound, based on a realistic rate, and paired with the behaviours that produce it.
Calorie tracking is a measurement tool that dramatically improves accuracy for most people and harms a minority.