Sleep and Food: What to Eat (and Avoid) for a Better Night's Rest

When it comes to getting a good night’s sleep, most of us think about routines, screen time, or even stress—but did you know that what you eat plays a huge role in how well you sleep?

Some foods help your body wind down and support deeper, more restorative sleep. While others, can work against you—interfering with your natural rhythms and leaving you tossing and turning.

So let’s break it down.

Foods That Help You Sleep

If you’re struggling to drift off or stay asleep, including more of the following nutrients in your diet may make a noticeable difference:

Tryptophan

An amino acid that supports the production of serotonin and melatonin, both of which are key to regulating sleep. Found in: Milk, oats, cashew nuts, lean chicken, turkey, and lamb.

Melatonin

Known as the "sleep hormone," melatonin helps regulate your body’s circadian rhythm and signals when it’s time to rest. Found in: Eggs, fish, nuts, brown mushrooms, cereals, and seeds.

Magnesium

This mineral supports nervous system regulation and muscle relaxation, both of which are essential for good sleep. Found in: Green leafy vegetables, nuts, and whole grains.

Fibre

Not only great for digestion, but also shown to support deeper sleep by helping stabilise blood sugar and hormone levels. Found in: Whole grains, oats, asparagus, and broccoli.

Foods That Keep You Awake

On the flip side, some ingredients and food habits can interfere with your ability to fall or stay asleep. Consider limiting these, especially in the evening hours:

Caffeine

It’s a stimulant that blocks the brain’s natural sleep signals—especially problematic when consumed in the afternoon or evening. Tip: Swap late-day coffees for herbal teas or decaf alternatives.

Alcohol

While it might make you feel drowsy initially, alcohol disrupts REM sleep—the deep sleep stage that supports memory, mood, and learning.

Spicy Foods

Capsaicin, the active ingredient in spicy foods, can raise your body temperature and make it harder to fall asleep or stay asleep.

Sugary or Fatty Foods

Foods high in sugar or unhealthy fats may reduce the amount of time your body spends in deep, restorative sleep. Tip: Opt for balanced meals and lighter evening snacks.

Additives and Preservatives

Some additives, preservatives, food colourants and artificial sweeteners have been associated with sleep disturbances. While it may be tricky to pin point if this is a factor in your sleep quality, it’s helpful to try avoid consuming too much ultra-processed foods.

It’s not just what you eat, but how you eat that influences sleep quality.

Eating Too Close to Bedtime Can Disrupt Sleep

• Large meals late at night can lead to indigestion, acid reflux, and discomfort that interfere with falling or staying asleep.

• Ideally, aim to finish your last main meal at least 2–3 hours before bedtime to allow proper digestion.

Consistency in Meal Timing Supports Circadian Rhythms

• Your body's internal clock — the circadian rhythm — thrives on consistency. Eating at irregular times, especially late at night, can shift your body clock and negatively affect both sleep onset and sleep quality.

• Research shows that erratic eating patterns can confuse the body’s natural signals for rest, making it harder to fall asleep at your usual time.

Low Blood Sugar During the Night Can Cause Wake-Ups

• If you go to bed overly hungry or after a long fasting period, blood sugar levels can drop overnight, triggering cortisol release (your “wake up and alert” hormone).

• A light snack before bed—something like a banana with nut butter, a few almonds, or some Greek yoghurt—can stabilise blood sugar and support more restful sleep.

Eating Mindfully Supports Relaxation

• Eating meals in a calm, relaxed way (rather than on the run or while stressed) helps activate your parasympathetic nervous system—the “rest and digest” mode.

• This can indirectly support better sleep by lowering stress hormones like cortisol before bedtime.

Good sleep isn’t just about when you switch off your lights—it’s also about how you fuel your body throughout the day. By making small shifts to include more sleep-supportive nutrients and reducing foods that disrupt your rest, you’ll give your body the best chance at a truly restful night.

So next time you're planning dinner, remember: you’re not just feeding your body—you’re setting yourself up for sweet dreams.