Foods That Can Keep You Up at Night

Short Answer

What you eat in the evening directly impacts how well you sleep. Late caffeine keeps your brain alert by blocking sleepiness signals, and sugary snacks disrupt night-long stability through sudden glucose swings. Spicy ingredients keep your body running warm, and processed or high-fat foods overload your digestion right as you try to settle down. Wrapping up meals two to three hours before lights out gives your body time to settle.

What you eat in the hours before bed has a direct effect on how well you sleep.

Caffeine delays sleep onset, sugar fragments it, and heavy or spicy meals keep your body working when it should be winding down. Most people know some of this already. What most people miss is how these foods work and how much timing matters alongside food choice.

Plus, we'll touch on what foods keep you awake at night so you can make better choices for a good night's sleep.

Avoid These Sleep-Disrupting Stimulants

Avoid caffeine and alcohol, especially in the evening, because both can impact your sleep.

Caffeine

Some of our favorite foods have caffeine with out knowing it. They include foods such as chocolate, certain baked goods, drinks, and energy bars.

While they might give you a quick energy boost in the afternoon, they can also make it harder to fall asleep and stay asleep.

Even small amounts of caffeine in the late afternoon can delay sleep onset and reduce time in deep sleep. 

Worth Knowing: Caffeine increases REM occurrences and reduces time in deep sleep, which is why you may feel groggy even after a full night.  [1]

Steer clear of foods with caffeine, especially at night. Try caffeine-free options instead, or wind down with calming activities, which can help you sleep better.

Even the slightest amounts of caffeine can affect sleep. So, be mindful of your consumption, especially in the late afternoon and evening.

How Caffeine Disrupts Sleep:

• Increases Alertness: Caffeine increases alertness and delays sleep onset, making it difficult to fall asleep at your usual bedtime.
• Reduces Quality: Even if you fall asleep, caffeine can diminish the quality of your rest, resulting in lighter and less restorative sleep.
• Extends Latency: Consuming caffeine in the late afternoon or evening can increase the time it takes to fall asleep, known as sleep latency.
• Fragmented Sleep: Caffeine’s stimulant effects can cause more frequent nighttime awakenings, leading to restless sleep and keeping you awake at night.

Did You Know: We’ve highlighted the best foods to help your mind and body relax before bedtime. Some foods include cottage cheese, tart cherries, turkey, and more.

Sugary Foods and Snacks

Be cautious of hidden sugars! Nowadays, sugar is almost everything, from your favorite breakfast cereals to yogurt and even in some energy bars.

These foods and snacks with high levels of added sugars can stimulate your mind, resulting in a difficult time falling asleep.

This can potentially lead to insomnia and other common sleep disorders. It’s best to avoid them a few hours before bedtime.

A 2020 study found a clear connection between high-glycemic foods and insomnia in postmenopausal women over a three-year span. [2]

When blood sugar crashes overnight, it triggers cortisol and adrenaline, the same hormones that keep you alert and reactive. 

How Sugar Can Throw Off Your Sleep

The crash is the problem, not just the spike. When blood sugar drops sharply, the body releases cortisol and adrenaline to compensate. Both hormones promote alertness.

That hormonal response is what causes the restlessness and middle-of-the-night waking that high-sugar evenings produce, even when you fall asleep initially without much trouble.

When your blood sugar spikes and drops during the night, it often leads to waking up more often and restless sleep, leaving you feeling groggy the next day.

Having sugary treats or drinks late in the evening can also make it harder to unwind and relax before bed.

That doesn’t mean you can’t enjoy sweets—just keep an eye on how much sugar you’re consuming, especially close to bedtime, to give yourself a better shot at peaceful sleep.

• Energy Spikes and Crashes: When you eat sugary foods, your body gets a quick burst of energy, but it’s often followed by a sudden crash that leaves you feeling tired—and that can wake you up during the night.
• Restlessness: Sugar can make your brain more active and interfere with melatonin, the hormone that helps you relax and fall asleep, making it harder to wind down.
• Staying Awake: Eating a lot of sugar right before bed can make your sleep restless and less refreshing overall.

Get the full rundown on sleep struggles in our blog about the common sleep disorders.

Sugary Food Alternatives:

Skip the late-night sugar rush and swap in snacks that won’t leave you tossing and turning. Instead of grabbing candy or cookies, try:

• Fresh fruit for a naturally sweet fix
• Whole grains that keep your energy steady
• Light snacks made with natural sweeteners

These choices are easier on your body and support better sleep when you’re winding down for the night.

High-Fat and Fried Foods

High-fat foods include fast food, fried items, and high-fat dairy products.

They usually contain unhealthy fats, such as trans fats and saturated fats, commonly found in burgers, fried chicken, French fries, pizza, full-fat cheese, and ice cream.

While cheese is commonly considered a comfort food, it is actually one of the worst foods to eat before bed, including Cheddar, Swiss, Parmesan, blue cheeses, and gorgonzola, as they contain tyramine.

This can impact your body by increasing the release of norepinephrine, a neurotransmitter that can stimulate brain activity and elevate blood pressure. [3]

High-fat meals are hard to digest and keep your body working when it needs to cool down and wind down for sleep. 

Impact on Sleep:

Heavy, greasy foods late at night can mess with your sleep more than you think.

That burger and fries might taste great during the game, but your body pays for it later. High-fat meals are hard to digest and can leave you feeling:

• Uncomfortable and restless
• Dealing with acid reflux or indigestion
• Tossing through lighter, broken sleep

Lighter evening snacks are easier on your system and set you up for a better night’s rest.

Smarter Late-Night Alternatives

When late-night cravings hit, you don’t have to settle for greasy comfort food.

A few simple swaps can make a big difference for your sleep and how you feel in the morning:

• Lean proteins like chicken, turkey, fish, or beans help keep you satisfied without weighing you down
• Healthy fats from avocados, nuts, or seeds give you lasting energy
• Baked or grilled options are gentler on digestion than fried foods, and still just as tasty

These lighter choices fuel your body without the heavy crash—perfect for winding down at night.

Spicy Foods

A little heat on your plate might taste great, but it can keep you up later than you’d like.

Spicy foods—think jalapeños, habaneros, hot sauce, Sriracha, or even seasonings like cayenne, paprika, and curry—can trigger heartburn and make it harder for your body to settle down at night.

If you love spicy meals, enjoy them earlier in the evening so they don’t interfere with your sleep.

Spicy foods raise core body temperature at exactly the time your body needs to cool down to fall into deep sleep. 

How It Affects Sleep

That late-night plate of spicy wings or curry might taste amazing, but it can cause more problems than you realize once you hit the pillow.

Spicy foods often trigger heartburn or indigestion, which can wake you up throughout the night.

On top of that, they can raise your body temperature, making you sleep hotter and making it harder to fall asleep.

Does Cayenne Pepper Affect Sleep?

Cayenne is worth calling out specifically because it is often used for health benefits during the day, but its effects at night work directly against good sleep.

Capsaicin, the active compound in cayenne, raises core body temperature by triggering thermoreceptors in the gut and skin. Your body needs to drop its temperature by one to two degrees to initiate deep sleep. A dose of capsaicin close to bedtime delays that drop.

Cayenne also increases gastric acid secretion, which raises the risk of reflux and heartburn during sleep. Hot sauces, spicy supplements, and cayenne-heavy seasonings on dinner are the most common evening sources.

Moving them to earlier in the day eliminates the nighttime temperature and reflux effects without giving up the benefits.

Flavorful Alternatives Without the Heat

Love bold flavors but notice spicy foods mess with your sleep? You don’t have to give up taste—just swap in gentler seasonings that add flavor without the fire. Give some of these a try:

• Mildly seasoned options like garlic, ginger, or a touch of mild paprika
• Herbs such as basil, parsley, thyme, rosemary, and oregano for fresh, savory notes
• Gentle spices like cinnamon, turmeric, or coriander to keep meals tasty without the burn

Why Heavy Meals Hurt Your Sleep

The bigger the meal, the longer digestion runs, and the longer digestion runs, the harder it is for the body to shift into sleep mode. 

Loading up on a big dinner or late-night snacks right before bed can make it harder to fall asleep comfortably.

When your stomach is working overtime to digest a heavy meal, you’re more likely to feel bloated, restless, and wide awake instead of relaxed.

If you do need something before bed, stick with lighter snacks that are easier on your system. Your body—and your sleep—will thank you.

Lighter Alternatives

Choosing smaller, balanced snacks at night can make a big difference for your sleep. Because they’re easier to digest, they help you unwind without feeling heavy.

A few great options include:

• A small bowl of oatmeal, which provides calming carbs that support serotonin release
• A banana, packed with potassium and magnesium to help relax your muscles
• Light snacks like yogurt, a handful of almonds, or whole-grain toast with a little peanut butter

Citrus Fruits

Citrus acid can irritate the esophagus and trigger reflux that wakes you before you reach deeper sleep stages. 

Fruits like oranges, lemons, limes, and grapefruits are really acidic and can cause digestive issues at night.

They might irritate your esophagus and trigger heartburn or acid reflux. Both can disrupt your sleep.

If that happens, try sleeping on your left side. This sleeping position has helped many people reduce the frequency of acid reflux episodes.

Garlic

Garlic is worth knowing about for sleep specifically because it raises body temperature and can cause reflux, two of the most common nighttime disruptors.

Garlic contains allicin, a compound that increases circulation and raises core body temperature. That warming effect, which is useful during the day, works against the temperature drop your body needs to fall into deep sleep.

Garlic also relaxes the lower esophageal sphincter, which makes acid reflux more likely. For people who already experience reflux, eating garlic close to bedtime increases the chance of waking up in the night with discomfort.

This does not mean avoiding garlic entirely. Cooking it earlier in the day or using smaller amounts in evening meals reduces the temperature and reflux impact while keeping the flavor.

Processed Foods

A 2020 study of around 2,500 young adults found that higher intake of processed foods was linked to poorer sleep quality. [4] 

Highly processed foods include fast food and prepackaged snacks often packed with sugar, unhealthy fats, and other ingredients that can mess with your sleep. 

And it’s not just adults. In an earlier study, research showed that teens who ate more processed foods tended to sleep less and sleep worse. [5]

Try cutting back and see if your sleep improves.

Foods That Can Help You Sleep Better

Some foods support sleep by helping regulate melatonin, calm the nervous system, or keep blood sugar steady in the evening.

• Tart cherries support natural melatonin production.
• Kiwi may help improve sleep onset and duration.
• Almonds provide magnesium linked to relaxation.
• Oats support steady blood sugar overnight.
• Turkey contains tryptophan, involved in sleep hormones.

For a deeper breakdown of how these foods work and when to eat them, read our full guide on the best foods that can help you sleep better at night.

When You Eat Matters as Much as What You Eat

Late eating can quietly work against your sleep, even if the food itself is considered healthy. Large meals close to bedtime keep your digestive system active, making it harder for your body to fully relax and fall asleep.

Big or heavy meals can also trigger blood sugar spikes, which may lead to restlessness or middle-of-the-night wakeups as your body works to rebalance.

For most people, finishing meals two to three hours before bed gives digestion enough time to settle and supports smoother sleep onset. Timing your last meal earlier in the evening is one of the simplest ways to improve sleep without changing what is on your plate.

The Bottom Line

Sleep quality and what you eat are more directly connected than most people realize, and the timing of your last meal matters as much as the food itself. 

Getting good sleep is key to your health, and what you eat before bed makes a big difference. Some foods help you sleep better, while others can cause restless nights and tired mornings.

Knowing how caffeine, alcohol, sugary, spicy, high-fat, and certain fruits affect your sleep can help you choose smarter food choices.

Look for lighter, balanced snacks, such as low-sugar fruits like berries or apples, to help your body relax, or consider specific drinks.

Making these small changes can boost your sleep quality and overall health—helping you wake up feeling refreshed and ready for the day.