A very common pattern
A review of many studies found that, after a diet, more than half of the weight lost was regained on average within two years, and more than three quarters within five years (Anderson et al., 2001). These figures do not mean weight loss is pointless; they show that the period after the diet matters as much as the diet itself.
Why the weight comes back
- A diet that was too strict: the lower the intake, the stronger the hunger when it ends, and the more abrupt the return to old habits.
- Muscle lost along the way: a deficit that is too large or too low in protein costs muscle. The body then uses slightly less energy, at rest and on the move.
- Lower needs at a lower weight: a lighter body needs less energy. Going back to your old portions therefore brings weight back, even without overeating.
- No transition: going overnight from the diet to “eating normally”, with no guidance for this new stage.
- Unchanged habits: if the diet relied on bans rather than new habits, the old ones return over time.
How to avoid the yo-yo effect
- Lose weight at a reasonable pace: aim for 0.5 to 1% of your body weight a week rather than a spectacular drop. Our weight-loss time calculator gives you a realistic estimate.
- Keep protein at every meal and stay active, to protect your muscles while you lose weight. See our protein calculator.
- Eat foods you enjoy: a plan you like turns into habits; a plan you put up with comes to an end.
- Plan a stabilisation phase: raise your intake gradually towards your new needs over several weeks rather than stopping all at once.
- Keep weighing yourself after the loss: spotting a one- or two-kilo regain lets you correct it early, before it settles in.
Stabilisation, the most forgotten step
Stabilisation means finding the intake that maintains your new weight, raising it in small steps while keeping an eye on the scales. It is when new habits take root. This is why the cure BalenZ programme includes a stabilisation phase and a final review with maintenance recommendations calculated at the weight you have actually reached. See How it works.
Is repeated dieting harmful?
Repeated weight swings are draining and can damage your relationship with food. If you have gone from diet to diet without lasting results, or if you feel a loss of control around food, talk to your doctor before starting a new programme.