Binge Eating on a Diet: Why It Happens and What Helps
By CoachAk · · 6 min read
Binge eating on a diet is common, and it is not a sign that you lack willpower. The stricter the diet, the bigger the hunger and the more rigid the rules, the more likely a single slip turns into eating far more than you meant to. The fix is usually not a stricter plan the next day. It is a gentler deficit, regular meals, more flexible rules and getting straight back to normal eating. If binges happen often and feel out of control, it may be binge eating disorder, which is a health condition that deserves proper help from your GP.
Binge eating on a diet: the short answer
- Severe restriction raises the risk. Big deficits, banned foods and long gaps without eating all make binges more likely.
- The day after, eat normally. Do not starve, purge or punish yourself with exercise. Go back to your usual meals.
- Prevent the next one with a moderate deficit, regular meals with protein and fibre, foods you enjoy built into the plan, and enough sleep.
- Get help if it keeps happening. Regular binges with a loss of control, followed by guilt or shame, are a reason to see your GP.
Why dieting can lead to binges
Hunger builds up
The famous Minnesota Starvation Experiment of the 1940s, led by Ancel Keys, put 36 young male volunteers on about 1,570 calories a day for six months, aiming for each to lose about 25% of his body weight. They became obsessed with food, and once they were later allowed to eat freely, some of them overate to extremes despite being warned not to. That was a far harsher diet than anyone should follow, but it shows what deep, long restriction does to appetite.
Physique athletes see a version of it too. In a 1995 survey in the International Journal of Eating Disorders, Andersen and colleagues asked 45 men competing in a drug-free bodybuilding contest about their eating. About 46% reported binge eating after competitions, and 81.5% said they were preoccupied with food at least some of the time.
Rigid rules backfire
How you diet matters as well as how hard. In a 1999 study in the International Journal of Eating Disorders, Westenhoefer and colleagues looked at two styles of dieting:
| Style | What it looks like | What the study linked it with |
|---|---|---|
| Rigid control | Banned foods, all-or-nothing rules, "I've ruined it now" | More frequent and more severe binge eating, and a higher BMI |
| Flexible control | Smaller portions of foods you like, with nothing banned outright | Less binge eating, a lower BMI, and more success at losing weight in a year-long program |
This kind of study shows a link, not proof of cause, but the pattern is familiar. A rule like "no chocolate, ever" turns one biscuit into a broken diet, and a broken diet into "I might as well finish the packet and start again on Monday".
Common triggers
Binges rarely come from nowhere. Look out for:
- a very large deficit, or days of eating far less than planned;
- long gaps without food, then a huge evening appetite;
- short sleep, which is linked with more hunger;
- alcohol, especially in the evening;
- stress, boredom or low mood;
- having binge foods in easy reach when you are tired.
What to do the day after a binge
The aim the next day is simply to get back to normal eating.
- Eat breakfast and your normal meals. Skipping meals to "make up for it" sets up the next binge.
- Do not punish yourself with exercise. Train as planned, no extra.
- Expect the scale to jump. A day's weight change after a binge is mostly food, salt and water, not fat. It settles over the next few days; how to read the scale explains why.
- Note what happened, without judgement. What time was it? How hungry, tired or stressed were you? What came before it?
- Talk to someone if it is weighing on you: a friend, your coach, or your GP.
If you have made yourself sick, used laxatives or exercised to make up for eating, please speak to your GP. Those are signs to get help, not to try harder.
Overeating, a binge, or binge eating disorder?
Everyone overeats sometimes: a big meal out, a second helping of pudding. That is normal.
A binge feels different. You eat a large amount quickly and feel unable to stop. The NHS describes binge eating disorder as regularly eating a lot of food over a short period until you are uncomfortably full. Its symptoms include:
- eating when you are not hungry;
- eating very fast during a binge;
- eating alone or in secret;
- feeling depressed, guilty, ashamed or disgusted afterwards.
Binge eating disorder can affect men and women of any age, and not everyone with it gains weight. If this sounds like you, the NHS advises seeing a GP as soon as you can. In the UK you can also talk in confidence to the eating disorder charity Beat, whose adult helpline in England is 0808 801 0677 (it has separate numbers for Scotland, Wales and Northern Ireland). Outside the UK, your doctor can point you to local eating disorder services.
There is good treatment. NICE, which sets guidance for the NHS, recommends guided self-help as the first step for binge eating disorder, with cognitive behavioural therapy (CBT) if that is not enough. NICE also notes that this treatment is not designed to make you gain or lose weight. So if you think you have binge eating disorder, speak to your GP before starting or continuing a diet.
How to make binges less likely
These ideas are for occasional overeating while dieting. If binges are frequent or feel out of your control, start with your GP rather than a new diet plan.
Keep the deficit moderate. Aim to lose about 0.5 to 1% of your body weight a week, and use the gentler end if binges have been a problem. A slower diet you can follow beats a faster one that collapses every Friday.
Eat regular meals. CBT for binge eating, as described by the NHS, includes planning meals and snacks across the day to build regular eating habits. Long gaps without food make evening binges more likely.
Build meals around protein and fibre. Protein at 1.6 to 2.2 g per kg of body weight a day, plus vegetables, fruit, beans and whole grains, makes the same calories more filling. How to stop feeling hungry on a diet covers this in detail.
Plan for the foods you love. Put a portion of chocolate or crisps into your plan rather than banning them. That is flexible control in practice.
Consider a break. If you have been dieting for months, a planned week or two at maintenance can make the next stretch easier to follow. See diet breaks and refeed days.
Protect your sleep and your evenings. Know your risky times and plan for them: a satisfying dinner, a set evening snack, and binge foods out of easy reach.
How coaching helps, and where it stops
Coaching is not treatment for an eating disorder. If you have, or think you may have, binge eating disorder or another eating disorder, start with your GP.
For people who overeat now and then while dieting, a coach can help by setting a deficit you can actually follow and changing it when the warning signs show. With one-to-one coaching from CoachAk, your calorie and macro targets sit in a private app alongside your training program, and each week you send a check-in that takes about three minutes, covering your weight, nutrition adherence, hunger, sleep, energy and stress. Your coach replies with written feedback and adjusts your plan, and you can message between check-ins when a hard week is coming. If you want a plan built around how you actually eat, apply for coaching.
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