Evening Wind-Down: A Nutrition Protocol for Better Sleep

Most sleep advice focuses on what you do (meditate, dim the lights, put the phone away). This is important. But what you eat in the evening is just as structural. Your nervous system, your blood glucose, your serotonin production, and your circadian rhythm all respond to specific nutrients at specific times.

The good news is that once you understand the mechanism, the food choices become obvious. You're not adding complexity. You're aligning what you eat with what your body is trying to do.

Why evening nutrition matters for sleep

Sleep is a metabolic state, not just a time when you stop being awake. Your body needs specific nutritional inputs to transition into that state efficiently. If those inputs are missing, you'll lie awake, or fall asleep but wake at 2 or 3am when blood glucose dips and cortisol spikes to compensate.

The brain runs on glucose, but it also needs amino acids to produce the neurotransmitters that enable sleep. Serotonin, GABA, and melatonin are all built from amino acids. Magnesium is the mineral that relaxes muscle tension and calm the nervous system. Glycine is the amino acid that signals the body that it's safe to lower core body temperature, a critical step in falling asleep.

Sleep doesn't begin at bedtime. It begins in the kitchen at dinner. The quality of your sleep is almost entirely determined by what you've eaten in the previous 3 to 4 hours.

The timing question

Eating too close to bed disrupts sleep because your digestive system is still working when you need it to be resting. Eating too early leaves your blood glucose low in the middle of the night, triggering a cortisol spike and waking you.

The sweet spot for most people is finishing your main meal 2 to 3 hours before bed. This gives you time to digest and stabilise blood glucose, but not so long that you wake hungry or depleted. If you eat dinner at 6pm and sleep at 10pm, you're in the window.

If your dinner is late, that's fine. Just don't eat a heavy, large meal. A lighter meal or snack 60 to 90 minutes before bed works better than nothing, but it's not optimal.

Glycine and gelatine

Glycine is the most abundant amino acid in collagen, and collagen is found richly in bone broth, gelatinous cuts of meat, skin, and connective tissue. Glycine has a direct effect on core body temperature. It signals your body to lower your core temperature, a known physiological trigger for sleepiness.¹

Studies show that glycine supplementation in the evening reduces the time it takes to fall asleep and improves sleep quality.¹ You're not just feeling better. You're measurably sleeping differently.

A bowl of bone broth in the evening is one of the most underrated sleep tools. So is a portion of slow-cooked meat with skin, oxtail stew, fish with the skin on, or even a simple gelatinous broth. These aren't fancy. They're traditional because they work.

Eating collagen and glycine in the evening isn't a supplement hack. It's how humans have been signalling their bodies to sleep for thousands of years.

Magnesium and where to find it

Magnesium is essential for relaxing muscles, regulating nervous system function, and enabling deep sleep stages.² Your modern diet has removed magnesium at nearly every step.

The best food sources are dark leafy greens (spinach, kale, chard), pumpkin seeds, almonds, and mineral water. A single bowl of cooked spinach contains 150mg of magnesium. A small handful of pumpkin seeds delivers another 150mg. These aren't trivial amounts.

If you're eating a proper dinner with leafy greens and seeds, you're getting magnesium. But if your evening is a small plate of pasta and chicken, you're missing the mineral entirely. The shift is simple: add the sides that used to be standard.

What to avoid and when

Caffeine past 2pm disrupts sleep for many people. The half-life of caffeine is 5 to 6 hours, meaning a substantial portion remains in your system at bedtime.³ Black tea, green tea, coffee, and cacao all contain caffeine.

Sugar and refined carbohydrates create blood glucose spikes in the evening, leading to crashes that wake you in the night. If you're eating processed foods at dinner, this is likely happening. Whole foods release glucose slowly and sustainably.

Alcohol feels sedating in the moment, but it fragments sleep in the second half of the night. You'll fall asleep easily, then wake repeatedly in the early hours. It also suppresses REM sleep, the stage most critical for memory and mood regulation.

Blue light in the evening (from screens) suppresses melatonin production.⁴ A simple phone setting (Night Shift on iPhone, Night Light on Android) reduces blue light significantly. Overhead lights in the evening should be warm and dim, ideally below 300 lux.

The complete evening protocol

Start with your main meal 2 to 3 hours before bed. The meal should include: a portion of protein (ideally a gelatinous cut if possible, but any quality meat or fish works), a substantial quantity of vegetables (especially dark leafy greens), and a small amount of carbohydrate (sweet potato, rice, or oats). This combination stabilises blood glucose for the night and delivers the nutrients your nervous system needs to downregulate.

Follow this with a bowl of bone broth or a light herbal tea about 60 to 90 minutes before bed. The broth delivers additional glycine and minerals. The warmth triggers a relaxation response. If broth isn't available, a mug of herbal tea (chamomile, passionflower, or ashwagandha) with a teaspoon of raw honey works well.

In the final hour before bed, dim your lighting to warm tones. Avoid screens if possible, or use Night Shift/Night Light mode. This allows melatonin production to begin naturally. A simple bedtime routine signals to your nervous system that sleep is coming.

The protocol isn't strict or complicated. It's a framework. Main meal with protein, vegetables, and carbs. Optional light broth or tea. Dim lighting. No screens. This is the rhythm humans have been living for millennia.

Bringing it together

The reason this works is that it's not fighting your biology. You're working with your circadian rhythm, your nutrient status, and your nervous system's natural downregulation. When you eat gelatinous foods in the evening, your core body temperature drops slightly. When you include mineral-rich vegetables, your muscles relax. When you finish eating 2 to 3 hours before bed, your digestion is complete and blood glucose is stable.

You're not taking supplements or making anything complicated. You're eating actual food in a sequence that aligns with how your body has been designed to prepare for sleep. That alignment is where transformation begins.

Start with one element. Add bone broth one evening. Eat a leafy green side with your next dinner. Turn the overhead light off and light a candle instead. Small shifts, made consistently, become the rhythm your body learns to trust. And when your body trusts the evening rhythm, sleep becomes reliable again.

References

1. 1. Bannai M, Kawai N. New therapeutic strategy for amino acid medicine: glycine improves the quality of sleep. J Pharmacol Sci. https://pubmed.ncbi.nlm.nih.gov/22293292/ [accessed May 2026].
2. 2. National Institutes of Health, Office of Dietary Supplements. Magnesium - Health Professional Fact Sheet. https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/ [accessed May 2026].
3. 3. Drake C, Roehrs T, Shambroom J, Roth T. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. J Clin Sleep Med. https://pmc.ncbi.nlm.nih.gov/articles/PMC3805807/ [accessed May 2026].
4. 4. Chang AM, Aeschbach D, Duffy JF, Czeisler CA. Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proc Natl Acad Sci USA. https://pmc.ncbi.nlm.nih.gov/articles/PMC4313820/ [accessed May 2026].