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Some people wake up the morning after overeating feeling even hungrier than usual. Comedian Lee Guk-ju, 40, has said she believes eating a large meal before bed stretches the stomach, leaving it feeling emptier the next day. While post-binge hunger is real, the stretched-stomach explanation does not quite hold up.
Lee made the remark recently on her YouTube channel, saying after waking up: "You know how if you eat a lot and go to sleep, you're even hungrier the next day? Your stomach has stretched, so it feels more empty." She then showed herself preparing breakfast.
The stomach does expand when food enters it, but it contracts again once the contents move into the small intestine. A single large meal does not permanently enlarge the stomach overnight. The hunger felt the next morning is more likely shaped by what was eaten, how much, how blood sugar shifted, and the quality of sleep — not by a stomach that stayed stretched.
Does overeating really keep the stomach enlarged until the next day? Not quite.
When food enters the stomach, its muscles relax and its volume expands. A large meal causes greater-than-normal expansion, which can produce bloating and a feeling of fullness.
As digestion progresses and food moves into the small intestine, the stomach's volume decreases again. Depending on the amount of food, its fat content, and its fiber content, a typical meal empties from the stomach over the course of several hours.
That is why it is hard to argue that a single day of overeating enlarges the stomach enough to demand more food the following day. Habitually eating large amounts quickly can affect how fullness is perceived and how much a person eats, but the idea that "the stomach stretched yesterday and is now empty" is too simple an explanation.
What matters more is what was eaten Monday night. A late-night meal heavy in carbohydrates — rice, noodles, bread or dessert — can cause blood sugar to spike quickly after eating and then drop.
A study published in the journal Nature Metabolism in 2021 analyzed post-meal blood sugar changes in 1,070 adults. Those whose blood sugar dropped sharply two to three hours after eating reported stronger hunger, ate their next meal sooner, and tended to consume more at that meal.
The group with the steepest blood sugar dips also tended to move their next meal earlier and take in more calories over the rest of the day. Monday's overeating cannot be directly blamed for Tuesday's hunger, but the findings suggest that post-meal blood sugar swings can influence appetite regulation.
A poor night's sleep after a late-night binge can also amplify the next day's appetite.
Eating a large amount late at night can disrupt sleep.
Going to bed on a very full stomach can cause bloating or acid reflux that interferes with restful sleep. Fatty foods or alcohol consumed alongside a late meal raise the likelihood of waking during the night or experiencing lower sleep quality.
Sleep deprivation is also linked to increased food intake the following day. A randomized clinical trial published in JAMA Internal Medicine in 2022 observed what happened when overweight adults who normally slept fewer than 6.5 hours a night extended their sleep time. The study involved 80 participants.
The group that extended their sleep by an average of about 1.2 hours over two weeks consumed roughly 270 kilocalories less per day than the group that maintained their usual sleep habits — without any changes to diet or exercise.
A growing body of research suggests that chronic short sleep can alter appetite-regulating signals and the brain's reward response to high-calorie foods. If Monday's overeating led to a late bedtime and reduced sleep, several factors may have combined to produce stronger hunger the next morning.
Repeated late-night eating can also push mealtimes later overall. A pattern can develop in which an upset stomach leads to skipping breakfast, followed by another large meal in the afternoon or evening.
Skipping meals the day after overeating can lead to another binge.
Many people try to compensate for Monday's excess by skipping breakfast or other meals the next day.
Skipping a meal does not cancel out the calories consumed the day before. When hunger builds too high, eating tends to speed up at lunch or dinner, and the amount consumed often exceeds normal portions.
After a day of overeating, it is better to return to a normal eating pattern rather than drastically cutting back. If hungry, eating moderate amounts of protein-rich foods — eggs, tofu, fish or meat — along with vegetables and whole grains can help sustain a feeling of fullness.
Choosing foods that require chewing over easy-to-eat options such as sugary drinks, crackers or bread is also helpful. Dietary fiber and protein slow digestion and help maintain satiety after a meal.
If the stomach is still uncomfortable from overeating, it is better to eat a lighter-than-usual meal from the outset and drink plenty of water rather than forcing a full portion. Eating a lot of salty food on Monday can temporarily increase body weight by raising water retention, so there is no need to drastically cut food intake based on the number on the scale the next morning.
The key after overeating is not to skip a meal entirely but to return to normal portion sizes and mealtimes. Cutting back on repeated late-night eating and overeating, and getting adequate sleep, are the most reliable ways to keep appetite in check over time.
rainbow@heraldcorp.com
