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For many of us, eating doesn’t stop once dinner ends. There’s often one more trip to the kitchen, maybe for a few squares of chocolate, a small bowl of ice cream, popcorn or crackers. Sometimes it’s less about hunger and more about the comfort of ending the day with a familiar routine.
This is why I’ve never been a fan of rigid rules that tell us we shouldn’t eat after a certain hour. At the same time, the question of whether late-night eating is “bad” for us isn’t new. Researchers have been studying it for decades, and the science has become increasingly clear on one point: our bodies generally don’t process food the same way at 9 p.m. as they do at 9 a.m.
That doesn’t mean an occasional bedtime snack is a problem. The bigger concern is a consistent pattern of eating large meals, or a significant portion of our daily calories, late at night.
What the Research Shows
Our bodies operate on internal clocks known as circadian rhythms. During the day, priorities include digestion, blood sugar control and energy use. At night, our bodies naturally begin shifting toward rest, recovery and energy storage.
Research has linked regular late-night eating with higher blood glucose levels, poorer insulin sensitivity, weight gain, acid reflux and disrupted sleep. Studies have also found that people who routinely eat later tend to feel hungrier and experience changes in appetite regulating hormones.
One of the most eye-opening experiences for me came when I first experimented with a continuous glucose monitor. I assumed that a small bedtime snack wouldn’t make much difference. After all, a slice of toast with nut butter or a small low-sugar cookie seemed harmless enough.
Instead, my glucose levels climbed above 140 and stayed elevated for more than six hours overnight. To put this in perspective, glucose levels consistently over 140 can be an indicator of insulin resistance or prediabetes.
But when I chose protein- and fat-based snacks like almond butter, nuts, cheese or one of the peanut butter cups from our Eat Fit Cookbook (recipe also available on the Eat Fit mobile app), my glucose levels stayed well under 100 throughout the night.
This is a study of one, not a clinical trial, of course. But it reinforced what we’re learning from the research: Many of us appear to handle carbohydrates differently late at night than we do earlier in the day.
And the concern isn’t just weight gain. When glucose remains elevated for hours, especially overnight, it can contribute to inflammation and insulin resistance. Over time, this can increase our risk of conditions like type 2 diabetes and cardiovascular disease.
Late-night eating can also worsen acid reflux and heartburn, particularly if we’re eating within a few hours of going to bed. Lying down makes it easier for stomach contents to move upward into the esophagus, disrupting both digestion and sleep.
Why Nighttime Cravings Hit so Hard
But one question that’s often missing from these conversations is: Why are we eating at night in the first place?
Many of us start the day with the best intentions. Yet by evening, the cookies, chips and ice cream seem to have a vice grip on us. When we give in, it’s easy to blame ourselves. But it’s not necessarily a reflection of our willpower. More often, it’s the result of everything that happened earlier in the day.
If we’ve under-eaten during the day, skipped meals, neglected protein, gotten dehydrated, lived under chronic stress or slept poorly, we’re far more vulnerable to intense cravings at night. Late-night eating becomes a distraction from everything swirling around in our heads, a way to turn down the “noise.”
Plus, many of the foods we reach for at night are engineered by food manufacturers to hit the “bliss point,” (yes, this is actually what it’s called) that sweet spot combination of carbs, fat and salt that light up our brains’ reward centers and keep us wanting more.
So What Can We Do?
Stay hydrated. Eat regularly. Include protein and healthy fats each time you eat. Choose fiber-rich carbohydrates. Move your body.
A brief walk after dinner can help, too. Even 10 minutes of movement can improve blood sugar control, support digestion and reduce the urge for mindless snacking later in the evening.
And if you truly are hungry at night, choose foods that work with your body rather than against it. Greek yogurt, cottage cheese, nuts, almond butter, a ready-to-drink protein shake, protein granola or a protein-rich smoothie can often be more satisfying than the highly processed snacks that tend to call our name after dark.
A nighttime snack isn’t automatically the problem. But if we’re finding ourselves in a nightly battle with cravings, the answer may have less to do with what happens at 9 p.m. and more to do with our choices and behaviors throughout the day leading up to it.
Find the peanut butter cup recipe and more quick, protein-forward ideas in “The Eat Fit Cookbook,” available at local retailers or online at EatFitCookbook.com. Use promo code ADVOCATE at checkout for 10% off.
Molly Kimball, RD, CSSD, is a registered dietitian with Ochsner Health and founder of Ochsner’s Eat Fit nonprofit initiative. For more wellness content, tune in to Molly’s podcast, FUELED Wellness +Nutrition, and follow @MollykimballRD and @EatFitOchsner on social media. Email nutrition@ochsner.org to connect with Molly or schedule a consult with her team.
