This Is the Right Time to Eat Dinner—And Chances Are, You’re *Way* Off. Here’s Why That’s a Big Problem
What time do you eat dinner? Early or late? Between work and kids and everything else going on in your life, it might just be whenever you can squeeze it into your schedule, no matter what time it is. Well, you might want to rethink that.
A recent YouGov poll found that 71% of respondents typically eat dinner at 6 p.m. or later. And for years, a 5 p.m. dinner has been shorthand for early-bird specials, senior discounts and a restaurant so empty you basically had the place to yourself. It was the meal you teased your parents and grandparents about, not something you engaged in yourself.
But scroll TikTok right now and you’ll find young professionals proudly logging off work and sitting down to eat while the sun’s still up, posting it under #EarlyDinner. Recent OpenTable data backs up what your feed is telling you: 53% of Gen Zers and 51% of Millennials say they’re especially interested in earlier reservations, and in New York City, 5 p.m. bookings have jumped 20%. A Chase Travel report went so far as to declare that “5:30 p.m. is the new 8 p.m.”
So who’s right? Is it the retirement community sitting down to an early post-golf-game supper (and Gen Zers filming their 5 p.m. reservations), or the majority of Americans sticking to the OG version of dinnertime? We asked experts to settle this debate once and for all. Ahead, five medical professionals, including experts in sleep health, neuroscience and psychology, give us the the lowdown on the right time to eat dinner—and why it’s so important.
Read on to find out exactly when you should sit down to dine.
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Does it really matter what time you eat dinner?
Yes. The experts we spoke with kept coming back to one idea: Your body runs on a roughly 24-hour internal clock—your circadian rhythm—and it governs far more than when you feel alert or sleepy. It also shapes how you handle food.
“Melatonin secretion, which signals the body to prepare for sleep, is suppressed by both light and food intake,” explains Sarah Boss, MD, a psychiatrist and the clinical director at The Balance rehab clinic. In other words, getting the timing right between dinner and bedtime really makes a difference.
So what is the best time to eat dinner?
It depends on your bedtime, but the research points overwhelmingly in one direction: earlier, and finished well before you turn in. Yep, according to science, it turns out that Gen Z (and your grandma) have stumbled onto a genuine health upgrade with those dinners before 6 p.m.
“Late eating keeps insulin elevated and delays melatonin onset,” Dr. Boss says. Eat too late and you force your body to do two jobs at once—digesting a meal and managing blood sugar, exactly when it’s trying to wind down for sleep.
It’s more personal than a single number on the clock, but it is important to get the timing right based on your life and your sleep schedule. Here’s why.
You’ll sleep better
This is the big one. “The most consistent finding is that a large meal close to sleep, within about one to two hours, is more likely to impair sleep continuity,” says Avinesh Bhar, MD, a sleep physician and the founder of Sliiip.
If you lie down with a full stomach, your digestive system is working overtime when your body wants to power down. “Digestion raises blood sugar, insulin, metabolic activity and body temperature at a time when the body should be cooling down and preparing for sleep,” says Michael Breus, PhD, a clinical psychologist and sleep specialist known as the Sleep Doctor.
There’s also a hormonal handoff happening in the background. “At night, our cortisol levels want to start dropping so that [our brain] can favor the release of melatonin instead,” says Maj. Allison Brager, PhD, a neuroscientist and the U.S. Army’s leading sleep expert. When you’re not busy digesting, she explains, those daytime processes can go offline so your sleep systems can come online.
You’ll dodge the blood-sugar roller coaster
Your body is simply worse at handling sugar after dark. Insulin sensitivity peaks in the morning and dips in the evening, so the same plate of food spikes your blood sugar higher at night than it does at midday.
The proof is dramatic: Researchers at Johns Hopkins found that a 10 p.m. dinner raised post-meal glucose by about 18% compared with a 6 p.m. dinner of the identical meal. And a follow-up study from the same team found that staying up later didn’t reverse the effect, pinning the blame on circadian misalignment rather than simply eating too close to bedtime.
In other words, when it comes to blood sugar, the actual time on the clock matters—not just how long before bed you eat. “Eating during elevated melatonin can create circadian-metabolic misalignment and is associated with poorer glucose tolerance—particularly if dinner is within two hours of habitual bedtime,” says Dr. Bhar.
You may lose weight
An early dinner is not a magic weight-loss button—your total daily intake still matters most. But timing appears to tip the scales.
In a study conducted at the University of Alabama at Birmingham, researchers found that people who ate earlier in the day lost nearly 14 pounds, compared with about 9 pounds for those eating over a longer window. And a 2026 review of 41 randomized trials and more than 2,000 participants, published in BMJ Medicine, likewise found that earlier eating beat later eating for both weight loss and fasting insulin levels.
“Given the same amount of total daily calories, eating larger meals earlier in the day will result in putting on less fat than the same amount of calories later in the day,” says Jacob Teitelbaum, MD, author of From Fatigued to Fantastic. “Eating heavier meals early in the day also suppresses your appetite hormones so you don’t overeat at night.”
Bonus? Eating early also doubles as intermittent fasting—no willpower needed. “There’s this whole push now to support intermittent fasting, eating within a 12- to 14-hour window,” says Dr. Brager. “Eating dinner early supports this without intentionally trying to.” Finish dinner in the early evening, sleep seven or eight hours, and, as she puts it, “there’s your 12-hour window of fasting right there.”
You’ll reduce acid reflux
Gravity is doing more work than you think. “When lying down, gravity no longer helps keep stomach contents below the diaphragm,” says Dr. Bhar. “Sleep also reduces swallowing and esophageal clearance, so acid or non-acid reflux is more likely to cause discomfort, leading to micro-awakenings.”
One study from Japan’s Osaka City University found that people whose dinner-to-bed gap was under three hours had nearly 7.5 times the odds of reflux disease compared with those who ate four or more hours before bedtime.
You’ll stop fighting your biology
“Our bodies were designed to have most of our calories at midday around lunch,” says Dr. Teitelbaum. “This changed as we became industrialized and moved from farms to cities. Having the main meal at lunch with a nap after was inconvenient to factory owners.”
If you eat against that ancient rhythm, you pay for it. In fact, Dr. Brager notes that “shift work is highly associated with obesity, diabetes and ulcers, and a large part of it is because of eating at times of the day when we weren’t programmed to eat.” As she bluntly puts it, “our biology has not been programmed, nor will it ever be programmed, to eat at night.”
That’s not just a shift-worker problem. Researchers at the Barcelona Institute for Global Health found that eating your last meal after 9 p.m., versus before 8 p.m., was linked to a 13% higher risk of cardiovascular disease.
Won’t eating early just make you snack later?
Possibly, but done right, an earlier dinner can actually quiet nighttime hunger, because steadier blood sugar means fewer cravings. There’s often an adjustment curve too. “Nighttime hunger after shifting to earlier dinners is usually a two-week adjustment period, during which the body’s ghrelin patterns—the hunger hormones—recalibrate,” says Dr. Boss.
Counterintuitively, it’s the late meal that can leave you hungrier. “Poor or fragmented sleep can also increase the hunger hormone ghrelin and reduce leptin, the hormone that signals fullness,” says Dr. Breus. “Eating later can sometimes make you hungrier—not less hungry—the next morning.” In one Harvard study, eating meals about four hours later increased hunger and raised the ratio of ghrelin to leptin.
If you do need a bite before bed, choose wisely. You should aim for foods that are low in sugar and high in protein, like walnuts or almonds, says Dr. Brager—not a bowl of ice cream. Dr. Breus and Dr. Bhar also like this formula: a small snack, around 150 to 200 calories, comprised of a protein and a slow carb, such as Greek yogurt with a few berries, a banana with a little nut butter or a small bowl of oatmeal. The goal, Dr. Breus says, is “to quiet genuine hunger without asking your body to digest another meal while you sleep.”
How to design your day around an earlier dinner
Shifting dinner earlier works best when the rest of your day shifts with it. A few expert-backed tweaks:
- Front-load your calories. Make breakfast and lunch your bigger meals, and let dinner be the lightest. “Having a lighter, low-calorie meal in the evening, preferably high in proteins and complex carbohydrates and low in sugars and fats, supports deeper sleep,” says Dr. Teitelbaum.
- Actually sit down and eat. Don’t inhale dinner standing over the sink. Giving your body time to digest is the entire point.
- Cut off caffeine early. “You want to stop caffeine intake at least eight hours before bed,” says Dr. Brager, noting that “the half-life of caffeine is anywhere from four to six hours.”
- Rethink the nightcap. “The best time of day to drink is in the day,” says Dr. Brager, because “alcohol most impacts your ability to enter restorative sleep.” Dr. Breus draws the line at three to four hours before bed.
- Take a short after-dinner walk. Ten easy minutes helps blunt the blood-sugar rise after a meal.
- Stay hydrated—but taper at night. Big fluid volumes right before bed can send you to the bathroom and fragment your sleep.
- Ease into breakfast the next morning. An earlier, lighter dinner often means you wake up genuinely hungry—a good sign your metabolic clock is back in sync.
But what if you’re still at work at 6 p.m.?
Here’s the reassuring part: Every expert we spoke with agreed—it’s the gap that really counts, not the clock.
“Anchor the meal to your bedtime,” says Dr. Bhar. “Finishing a normal dinner about two to four hours before bed is a sensible starting range.” Dr. Brager puts the sweet spot at two to three hours before bed, adding simply, “the earlier, the better.” Dr. Boss frames it in a way that takes the pressure off entirely: “For someone going to sleep at midnight, eating at 9 p.m. is physiologically equivalent to a 6 p.m. dinner for someone sleeping at 9 p.m.”
What if your dinner genuinely can’t happen until 8 or 9 p.m. and you can’t stay up late to compensate? “Make the late dinner smaller,” says Dr. Breus. “Move more of your calories to breakfast and lunch, then choose a lighter dinner built around lean protein, vegetables and a modest portion of slower-digesting carbohydrates.” His pro move afterward: “Stay upright and take a gentle 10-minute walk afterward, rather than going directly from the dinner table to bed.”
The bottom line
Dr. Teitelbaum sums it up in a single guideline: “Basically, your digestive system should be sleeping while you are.” And no, you don’t have to be perfect. Eating early only some nights still counts.
“Your biology responds to patterns, not perfection—so four or five well-timed dinners each week still matter,” says Dr. Breus. So go ahead—book the 5:30 table. You’re not turning into your grandparents. You’re just finally listening to your body clock.
Sources:
- Maj. Allison Brager, PhD, neuroscientist and U.S. Army sleep expert; phone interview, Aug. 7, 2026
- Michael Breus, PhD, clinical psychologist and sleep specialist; email interview, Aug. 8, 2026
- Avinesh Bhar, MD, sleep physician and founder of Sliiip; email interview, Aug. 7, 2026
- Jacob Teitelbaum, MD, author of From Fatigued to Fantastic; email interview, Aug. 6, 2026
- Sarah Boss, MD, psychiatrist and clinical director at The Balance rehab clinic; email interview, Aug. 7, 2026
- Journal of the Endocrine Society: “Rationale and Design of the Dinner Time 2 Trial”
- Sleep: “Comparing Post-prandial Glycemia After Late Eating vs Late Sleep”
- Cell Metabolism: “Late Isocaloric Eating Increases Hunger, Decreases Energy Expenditure”
- BMJ Medicine: “Effects of Timing and Eating Duration of Time Restricted Eating on Metabolic Outcomes”
- Yahoo: “What Time’s Dinner? More People (and Gen Z-ers) Are Saying 5 p.m.”
- Fox News: “Early-Bird Dinners Aren’t Just for Seniors
The post This Is the Right Time to Eat Dinner—And Chances Are, You’re *Way* Off. Here’s Why That’s a Big Problem appeared first on Reader's Digest.
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