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What Really Happens When You Eat Before Bed

Let’s face it—there’s something undeniably tempting about a late-night snack. Maybe it’s a cold slice of pizza calling your name from the fridge or a quick handful of almonds to quiet a growling stomach. But does eating before bed mess with your sleep, your weight, or your overall health? The truth isn’t black and white—it’s a bit more complicated.

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Your body has a natural rhythm—you have a circadian rhythm—that regulates everything from sleep to digestion. As the day begins to wind down, your metabolism decreases, and your body begins to prepare for sleep. Consuming food late in the evening, particularly heavy or sugary foods, will interrupt this natural process. Registered dietitian Alexis Supan breaks down that your body is less responsive to insulin later in the day, so those late-night calories are more likely to get stored as fat, not used for energy. But it’s not all about weight gain—what you’re eating and when can impact your blood sugar, sleep, and morning mood too.

Even so, it does not require you to outlaw all evening snacks. A small, intelligent snack can ensure that you sleep more soundly, particularly if you’re in bed with pangs of hunger distracting you. Certain foods that are high in tryptophan, such as turkey or bananas, or those high in magnesium, such as nuts or dark chocolate, might also ensure your body produces melatonin and serotonin, which aid relaxation and sleep. And for those who exercise in the evening or see a drop in blood sugar at night, a small protein snack can facilitate the recovery of muscle and prevent sleep interruption.

For others, however, consuming huge, fatty, or sweet meals regularly right before bed can lead to issues. Your digestive system must remain active when it should be slowing down, resulting in discomfort such as indigestion, bloating, or acid reflux. That type of disruption makes it more difficult to fall—and remain—asleep. Consuming heavy dinners close to bedtime can also decrease your deep sleep, the kind that makes you feel really rested. And if you get into the habit of snacking in front of the TV or scrolling on your phone, you could be eating more than your body requires, leading to weight gain over time.

So, what is the sweet spot for dinner? Most health professionals recommend having your last large meal two to three hours before bedtime. That allows your body time to digest before you go to sleep. When hunger pangs strike closer to bedtime, it’s acceptable to have a snack—just make it light and healthy. A small serving of Greek yogurt, a banana with one spoonful of almond butter, or some whole-grain crackers with hummus are excellent choices. Steer clear of anything greasy, fried, hot, sugary, or caffeinated. And though a beverage may sound like a soothing nightcap, alcohol can disrupt your sleep pattern later on at night, so it’s best to abstain from it before sleeping.

Portion control also comes into play. It’s simple to consume more than you know when you’re stressed or distracted. Try serving yourself a small serving and stashing the rest away—hunger may drive you to overindulge when eating directly from a bag or container, particularly late at night when willpower levels are low.

Ultimately, the best bedtime meal plan is the one that suits your body and lifestyle. Watch how your eating times and types of foods influence your sleep and how you wake up. If you wake up hungry or have insomnia after a late supper, experiment with changing your pattern. A little bit of change can make a big difference in sleeping better and waking up feeling better.

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