Eating for one: the divorce diet and what the research shows
Two opposite things happen and both are common. Some people cannot eat at all and lose weight fast, which reads as a silver lining and usually is not. Others find that the whole structure of household eating has collapsed and there is no longer any reason to cook. Neither of these is a discipline problem.
Food, Weight, and Eating for One
Weight change after divorce is real, well documented, and differs by sex, with men more likely to gain and women more likely to gain after marriage instead. The much-discussed unintentional weight loss during acute divorce stress is a stress-hormone and appetite effect, not a diet win, and it comes with a genuine relapse risk for anyone with an eating disorder history.
Weight gain after major relationship transitions differs by sex: men are more likely to gain weight after divorce, women are more likely to gain weight after marriage.
Reported consistently, not settled
Sociologists Dmitry Tumin and Zhenchao Qian analyzed 10,071 participants in the National Longitudinal Survey of Youth over a period from 1986 to 2008 and found large weight gains (over roughly 1 BMI point) were most likely for men in the two years following divorce, and most likely for women in the two years following marriage. The gap between married and unmarried people’s weight trajectories widened with age.
Sudden, unintentional weight loss during a divorce is common and is driven by stress physiology, not willpower or health.
Reported consistently, not settled
Acute psychological stress raises adrenaline and disrupts normal hunger and sleep signals, which suppresses appetite for many people rather than increasing it. Clinicians and psychologists who study eating behavior note that rapid stress-driven weight loss is often mistaken for a positive outcome, when it typically reflects poor sleep, missed meals, and anxiety, and the weight often returns once the acute stress resolves.
Acute life stress measurably changes appetite-regulating hormones and eating behavior over the following months.
Prospective research tracking cortisol and other appetite-related hormones found that individual stress responses predict later changes in food cravings and weight over a six-month window, with some people suppressing intake under stress and others increasing it. The direction of the effect varies by person, which is why one newly divorced person stops eating and another starts eating compulsively.
The organization that ran the main US eating disorder helpline shut it down in 2023, so an old referral to that hotline is now out of date.
The National Eating Disorders Association discontinued its long-running human-staffed helpline in May 2023, initially replacing it with an AI chatbot that was itself pulled after it gave harmful advice. Anyone directing someone in acute distress toward eating disorder support should not send them to the old NEDA helpline number. Current recommended resources are the National Alliance for Eating Disorders helpline and, for immediate crisis, 988.
Rapid, unintentional weight loss under acute stress typically reflects lost sleep, suppressed appetite, and adrenaline, not improved health. Psychologists who study this pattern specifically warn against treating it as a win.
Markey C (quoted); reporting via NBC Universal, 2016, TODAY / NBC News Health
Acute life stress is a well-documented trigger for relapse or new onset of disordered eating, because it disrupts the same appetite and hunger-regulation systems that eating disorders hijack. It is worth naming this risk to yourself early rather than after a relapse is underway.
Chao AM, Jastreboff AM, White MA, Grilo CM, Sinha R, 2017, Obesity
What to actually do
- If you notice you have stopped eating regular meals, treat it as a symptom to manage on purpose (small, easy, scheduled food) rather than a phase to ride out.
- Cooking for one after years of cooking for a household is a genuinely different logistical problem: batch-cooking and freezing single portions, or leaning on simple repeatable meals, reduces the food waste and decision fatigue that make people stop cooking altogether.
- If you have any personal history of an eating disorder, tell your therapist or doctor early in the divorce process rather than waiting for a relapse to become obvious.
- Use the National Alliance for Eating Disorders helpline for support and referrals, and 988 for immediate crisis; the old NEDA helpline number is no longer staffed.
- Weight and appetite changes during divorce are common enough to be unremarkable, but a sustained pattern of restriction, bingeing, or purging is a clinical issue, not a phase, and warrants professional support.
- Do not treat stress-driven weight loss as evidence of a successful diet; it usually is not sustainable and can mask nutritional deficits.