However, several studies show that people who eat before bed are more likely to gain weight ( 3 , 4 , 5 ). The reason for this is much simpler than you might expect. It turns out that people who eat before bed are more likely to gain weight simply because a bedtime snack is an extra meal and, therefore, extra calories.
You won't gain weight by merely eating later if you eat within your daily calorie needs. Still, studies show that nighttime eaters typically make poorer food choices and eat more calories, which can lead to weight gain. If you're hungry after dinner, chose nutrient-dense foods and low-calorie beverages.
Weight gain
Your body gains weight when you take in more calories than you burn off. This is the case no matter when you eat. Going to sleep directly after you eat means your body doesn't get a chance to burn off those calories. In fact, eating a big meal and then hitting the couch can be just as harmful.
Eating before bed can cause the body's metabolism to slow. The body slows down its functions at night to prepare for sleep, but consuming foods, especially those high in carbs, can make it harder to digest and result in weight gain.
This myth has been around for years, and although some people could swear that their late-night eating habits do make them gain weight, recent research has shown that your body doesn't process food differently at different times of the day.
No, you shouldn't eat before bed, says Supan, and one reason is because of the way your body functions. “When you eat late at night, you're going against your body's circadian rhythm,” she says. It's all about the way your body adjusts its insulin sensitivity. Your body is more sensitive in the morning on purpose.
Unintentional weight gain occurs when you put on weight without increasing your consumption of food or liquid and without decreasing your activity. This occurs when you're not trying to gain weight. It's often due to fluid retention, abnormal growths, constipation, or pregnancy.
Some experts advise finishing food consumption in the early evening, as metabolism slows down after this time. However, this is not feasible for everyone. Some people may not be able to consume their evening meal until 7 p.m. or later. Even so, it is best to avoid food for 2–3 hours before bed.
Besides the extra calories, eating too close to bedtime can have other health implications such as digestive issues. When sleeping, our digestion naturally slows down as our metabolism enters a resting state. Lying down in bed immediately after eating can lead to symptoms such as indigestion, acid reflux and heartburn.
Some dieters go so far as to step on the scale after every meal. This poses a problem, because weight tends to fluctuate, on average, between 2 to 4 pounds throughout the day. The number that you see first thing in the morning may be far from the number you see midday or before your head hits the pillow.
“Everyone's weight fluctuates throughout the day, and especially from morning to night,” says dietitian Anne Danahy, MS, RDN. “The average change is 2 to 5 pounds, and it's due to fluid shifts throughout the day.” If you see fluctuations of less than 5 pounds, you needn't worry.
It can help with weight loss
Fasting one or two days a week may be a way for you to consume fewer calories over time. You may find this easier to do than cutting back a certain number of calories every day. The energy restriction from a 24-hour fast may also benefit your metabolism, helping in weight loss.
Get Meal Timing Right with RISE
There's no set time you should stop eating before bed, but as a guide, you should aim to have your last meal two to three hours before going to sleep. Avoid late-night meals, late-night snacking, and nighttime eating as much as possible.
There's no set time you should stop eating to lose belly fat, but, as a guideline, you should avoid eating two to three hours before bed to stop it from disrupting your sleep and body clocks, which can cause belly fat gain. Studies show early dinners can help people lose weight.
Experts recommend waiting at least three hours after you've eaten to go to bed. This allows your body time to digest your food so you're not up at night with an upset stomach, indigestion, or acid reflux. And it helps you stay asleep. Don't forego a meal to follow this rule.
Dehydration causes your body to retain excess water, which can lead to 5 pounds of weight gain overnight (5). When you feel thirsty and drink a lot of fluid at once, you'll absorb the extra fluid quickly and it shows up on the scale within 24 hours.
You will not gain weight from eating too few calories.
There are many reasons why it can seem like under-eating can lead to weight gain. But, science has shown over and over again that this isn't physiologically possible.
What happens if you sleep after eating? If you sleep directly after eating, you'll probably encounter indigestion, heartburn, and other digestive problems that disrupt nighttime sleep. You also increase your risk of unhealthy weight gain, obesity, and poor health over time.
Eating late at night may lead to acid reflux and negatively affect blood sugar management, blood pressure, and weight. This may be due to many factors like poor food choices.
To lose 10 pounds in one week, you'll need to burn between 3,500 and 5,000 calories more than you consume each day by restricting your diet to small portions of nutritious yet low-calorie foods, and significantly increasing your aerobic exercise with interval training, sports, and other vigorous activities.