Koru Nutrition
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Koru Sleep · free Advanced Magnesium with every pack

Sleep through the night. Wake up with a clear head.

A two-part night formula for people over 55 who are sick of lying awake, sick of waking at 2 a.m., and sick of feeling half-asleep by mid-afternoon.

Most sleep products are built to knock you out. This one is built to get you into the deep, unbroken sleep your body actually needs, and keep you there. Two bottles, taken together before bed - and the second one, Koru Advanced Magnesium, comes free with every pack. Made in Rangiora.

Start sleeping properly →
✓Made in our own Canterbury facility ✓Stocked by over 500 NZ pharmacies ✓60 day money back guarantee
Koru Sleep bottle and box surrounded by its natural ingredients - passion flower, green tea leaves and pumpkin seeds
NZMADE IN
RANGIORA
60DAY MONEY-BACK
GUARANTEE
ALSO SEEN IN The New Zealand HeraldStuffWaikato TimesStar NewsSouthland ExpressNewstalk ZB
A woman in her 60s sitting up in bed, wide awake in the lamplight, the bedside clock showing 2:17 a.m. while her partner sleeps

If you're over 55 and your sleep has changed, you're not imagining it

✓You get to sleep fine, then you're wide awake at 2 a.m. for no reason
✓You're in bed for eight hours and get up feeling like you had four
✓You've tried melatonin or a sleeping tablet and felt worse the next morning
✓You tried magnesium and nothing much happened
✓By three in the afternoon you're flat, foggy and reaching for the biscuits
✓You walk into a room and can't remember what you came in for

Here's the thing nobody tells you. These are not six separate problems. They are one problem. Your sleep isn't deep enough anymore, and it hasn't been for a while.

What Koru Sleep is built to do

Three things, in this order.

1
Get you to sleep

Without the drugged, heavy feeling. Passion flower and L-theanine settle the mind so you're not lying there running through tomorrow.

2
Keep you asleep

This is the part most products miss. 5-HTP and active B6 give your body what it needs to make its own melatonin through the night, and valerian helps you stay under instead of surfacing at 2 a.m.

3
Make the sleep deep

Properly absorbed magnesium, formulated for the over-55 body, so the sleep you get is the restorative kind. Not just unconscious. Actually asleep. That's the job of your free bottle of Advanced Magnesium.

That's the sleep promise. Now here's why the third part matters more than you think.

What deep sleep is actually for

Your brain cleans itself at night. After 60, it doesn't get long enough.

Every organ in your body is plumbed into the lymphatic system, which carries away the day's waste. Except your brain. Your brain has no drain of its own. So it cleans itself, and it does it while you're in deep sleep.

Diagram of the body's lymphatic network drawn in green through the torso and limbs, with the brain in navy at the top labelled 'no drain of its own'

The discovery

For most of a century nobody could say how the brain got clean. It sits inside a sealed case, packed tight, with no room for the plumbing every other organ gets. Then in 2012 a research team, watching living brains through a new imaging technique, found the answer hiding in plain sight: a network of channels running alongside the brain's blood vessels, carrying cerebrospinal fluid deep into the tissue. They named it the glymphatic system. We call it the nightly clean-out.

The follow-up work, a year later, is the part that matters for your sleep. Watched cell by cell in animals, the system barely ran during waking hours. But during sleep the gaps between brain cells opened up, by as much as 60%, fluid flowed in along the channels, and the day's metabolic waste washed out roughly twice as fast as it did in the waking brain. The brain doesn't clean itself around the clock. It waits until you're under.

Split diagram: awake, brain cells packed tight with amber waste dots trapped in the gaps; deep sleep, the gaps open wide and a green-blue wash carries the waste away - gaps open by up to 60%, waste clears about twice as fast
From the animal studies that followed the discovery - watched cell by cell in mice.

You can watch it happen

In 2019 scientists put sleeping volunteers into an MRI scanner and watched the same thing happen in humans, in real time. Every twenty seconds or so a big, slow brainwave rolled through - the signature of deep, slow-wave sleep - and right behind each wave came a pulse of cerebrospinal fluid, washing through the brain like a slow tide. Wave, then rinse. Wave, then rinse. All night.

Awake, the pulses all but stop. In light, broken sleep they're weak. It's the deep, slow waves that drive the pump. Which is why a night of shallow, drugged sleep doesn't finish the job, no matter how many hours you were technically unconscious.

Diagram from the 2019 human study: a slow green brainwave trace above a blue fluid-pulse trace, each pulse following each wave about every twenty seconds, beside a sleeping profile on a navy background

What changes after 60

Where the clean-out happens in a night
Illustrative sleep cycles - deep, slow-wave sleep clusters in the first half of the night
Awake Light Deep 10pm midnight 2am 4am 6am The clean-out window 2 a.m. - where you surface
Illustrative diagram of typical sleep architecture, not a measurement. The deep stages come early in the night - broken, shallow sleep cuts them short.

Here's what changes with age. The deep, slow-wave stage of sleep drops away sharply after 60. You can still be in bed for eight hours, but far less of it is the deep kind. So the clean-out gets cut short. Whatever didn't get cleared last night is still sitting there this morning, and by three o'clock you've piled a whole day on top of it.

That is the afternoon fog. That is the room you walked into for no reason. It was never your memory. It was your plumbing.

Think about a chimney

You don't see the soot building up. Nothing looks any different day to day. But leave it long enough and one day you've got a real problem. Your brain works the same way. Which is why the clean-out matters even on the nights you feel like you slept fine.

"Sleep isn't rest. It's the nightly clean-out."

Unconscious is not the same as asleep

An open bedside drawer of half-used sleep aids - an eye mask, foam earplugs, an empty blister strip, unlabelled bottles and a box of herbal tea
The knock-out approach

A sleeping tablet gets you unconscious. So does a big dose of melatonin. But the clean-out doesn't care whether you're unconscious. It cares whether you're deep. Something that drops you into shallow, drugged sleep and leaves you groggy at seven in the morning hasn't fixed anything. It's moved the problem to breakfast.

Unconscious, not deep
Plain shelf magnesium

Plain magnesium usually doesn't do it either. Most of what's on the shelf is magnesium oxide, which is cheap and barely absorbed, and after 55 your gut absorbs less of it again. You take it, feel nothing, and decide magnesium doesn't work for you. It probably never got in.

Never absorbed

Good sleep has three jobs. Get there. Stay there. Go deep enough to finish. Almost nothing on the shelf does all three. So we built two products that do.

The system

Two bottles. One habit. Forty-five minutes before bed.

Koru Sleep bottle with passion flower, green tea leaf and pumpkin seeds
What you're buying

Koru Sleep - gets you there and keeps you there

Passion flower and L-theanine for a quiet mind. 5-HTP and active vitamin B6 so your body makes its own sleep signal instead of borrowing one from a tablet. Valerian to hold you through the small hours. Zinc to support healthy sleep patterns. Because your body made the melatonin itself, there's nothing left over to make you groggy in the morning.

Free with every pack
Koru Advanced Magnesium bottle with spinach, almonds and bananas
Your free gift

Koru Advanced Magnesium - makes it deep

Magnesium is the mineral most closely tied to deep, slow-wave sleep, and it's the one most people over 55 are short on. Ours is magnesium bisglycinate, the form your gut actually absorbs, with boron to help your body hang on to it and vitamin D3 alongside. We formulated it for the over-55 body on purpose, because the over-55 body is who we've always made things for. A full bottle, worth $34.99, free with every bottle of Koru Sleep in your pack.

Sleep gets you there. Magnesium makes it count. Take them together, and let your body get on with the job.

Start sleeping properly →
From $49.99 a bottle · free Magnesium with every bottle · free delivery over $100

How it stacks up

Sleeping tablet / melatonin
Shelf magnesium
Koru Sleep + Magnesium
Helps you fall asleep
✓
sometimes
✓
Helps you stay asleep
rarely
sometimes
✓
Supports deep, slow-wave sleep
✕
depends on the form
✓
Your body makes its own melatonin
✕ dosed in
n/a
✓
Groggy in the morning
often
no
no
Magnesium form
-
usually oxide
bisglycinate + boron + D3
Formulated for over-55 absorption
✕
✕
✓
Made in NZ, in our own facility
✕
rarely
Rangiora, Canterbury

Getting started is the easy part

Three steps. No prescriptions, no appointments, no risk.

1
Choose your pack

One, two or four bottles of Koru Sleep - every bottle comes with a free bottle of Advanced Magnesium. Free delivery on orders over $100.

2
One habit, one moment

Two Koru Sleep and two Advanced Magnesium, together, with a glass of water about 45 minutes before bed. Keep both bottles on the bedside table.

3
Judge it at week four

Easier sleep often comes in the first week; deeper sleep and clearer afternoons take three to four. Your guarantee runs a full 60 days either way.

The first 60 days

1
First few nights

Most people find they get off to sleep more easily and wake less. Some feel it on night one. For others it takes a week or so. Don't judge it on the first night.

2-4
Weeks two to four

Sleep starts to feel more solid. The 2 a.m. wake-ups get further apart. Mornings feel clearer than they have in a while.

4-8
Weeks four to eight

This is where the magnesium has really built up and the deep sleep is doing its work. Muscles settle. The afternoon slump lifts because the night is finally doing its job. This is also why we give you 60 days and not 30.

The same woman the next morning, clear-eyed at the kitchen table with a cup of tea and the crossword, kettle steaming, the wall clock reading twenty to seven, garden gloves waiting by the door
Straight talk

This is not a sedative. It won't flatten you. It supports the sleep your body is already trying to get, which is exactly the sleep the clean-out needs.

From Rangiora with love

We still make every product ourselves

We're Koru Nutrition, from Rangiora in North Canterbury. We make every one of them ourselves, in our own facility, in controlled batches. That's why over 500 pharmacies across New Zealand put us on their shelves. Everything we make is built for people over 55, because that's who walks into a pharmacy and asks for us.

Our own Canterbury facility Over 500 NZ pharmacies 3rd party tested
Inside the Koru facility: a team member in a hairnet and white coat working at the labelling line, with packed batches stacked beside him
On the line in our own facility - every batch made and checked here. 3rd party lab tested in Christchurch.

Real people sleeping better every night

Getting to sleep
★★★★★✓ VERIFIED

"Prior to taking this product I had poor sleep patterns: often taking a while to get off to sleep and the same if had to get up to use the toilet. Now I get off to sleep easily and wake refreshed, less irritable and more focused."

Hilary H.
Verified customer · five 5-star reviews since 2019
Staying asleep
★★★★★✓ VERIFIED

"For years I've struggled to get more than 3-4 hrs per night. I now sleep most of the night, and wake, refreshed, and alert. Thank you, Koru Nutrition."

Rae B.
Verified customer
Waking clear
★★★★★✓ VERIFIED

"Koru Sleep is excellent I have been taking this nightly for some time now and I sleep soundly and relaxing and wake up refreshed at 5.30am each morning, so my Body Clock is working well and I love being up early as its the best part of the day."

Patricia G.
Verified customer · six 5-star reviews since 2021

Read this before you order

We would rather lose the sale than have this be wrong for you.

✕If you take antidepressant medication (SSRIs, SNRIs, MAOIs, tramadol) or St John's Wort, do not take Koru Sleep without checking with your doctor or pharmacist. 5-HTP should not be combined with these.
✕If you take medication for kidneys or diabetes, ask your pharmacist before adding magnesium.
✕If you're pregnant or breastfeeding, this isn't for you.
✕If you want something to knock you out tonight, this isn't that. It's for people who want their sleep to work properly again and are willing to give it a few weeks.

If none of that is you, carry on.

Questions people ask

Four capsules seems like a lot. +

Two Koru Sleep and two Advanced Magnesium, together, with a glass of water about 45 minutes before bed. One habit, one moment.

Will I be groggy in the morning? +

It's designed so you won't be. The sleep signal comes from what your body makes, not a dose still sitting in your system at 7 a.m.

I already take magnesium. Do I keep taking it? +

No. Drop it while you're on this. You don't need two, and the bottle in your pack is the better-absorbed form anyway.

How long until I notice something? +

Falling asleep more easily, often within the first week. Deeper sleep and clearer afternoons, give it three to four weeks. That's why the guarantee is 60 days.

Why two products and not one capsule? +

Because the jobs are different. Cramming a proper dose of magnesium into the same capsule as the sleep herbs would mean short-changing both. Two bottles means both are done properly - which is why the magnesium comes in your pack as its own full bottle, free.

What if it doesn't work for me? +

60 day money back guarantee. No arguments. Email or ring us in Rangiora and we'll sort it.

Choose your pack

Every bottle of Koru Sleep (60 capsules) comes with a free bottle of Koru Advanced Magnesium (60 capsules, worth $34.99) - one for one, so the whole pack works as a pair. Free delivery on orders over $100.

1 bottle
+ 1 FREE MAGNESIUM
1 bottle of Koru Sleep with a free bottle of Koru Advanced Magnesium
One-off · one month
$59.99
Ships from Rangiora · 60 day guarantee
Add to cart
2 bottles
+ 2 FREE MAGNESIUM
2 bottles of Koru Sleep with 2 free bottles of Koru Advanced Magnesium
One-off · two months · $54.99 a bottle
$109.98
Free delivery · 60 day guarantee
Add to cart
Best value
4 bottles
+ 4 FREE MAGNESIUM
4 bottles of Koru Sleep with 4 free bottles of Koru Advanced Magnesium
One-off · four months · $49.99 a bottle
$199.96
Free delivery · 60 day guarantee
Start sleeping properly →
60DAY
GUARANTEE

Try it for 60 days. If you're not sleeping better and waking clearer, send it back, empty bottles and all, and we'll refund you in full.

The soot doesn't clean itself

You won't feel the clean-out happening. You'll only feel it when it hasn't. The foggy afternoons. The room you walked into for no reason. The eight hours that didn't count.

Give your body a deep enough night to finish the job. Made in Rangiora. Backed by science. Built for you.

Start sleeping properly →
From $49.99 a bottle · free Magnesium in every pack · 60 day money back guarantee
4 bottles of Koru Sleep with 4 free bottles of Koru Advanced Magnesium
Koru Nutrition · 5 Kingsford Smith Drive, Rangiora, Canterbury 7400 · 0800 99 99 80 · info@korunutrition.co.nz
Koru Sleep and Koru Advanced Magnesium are dietary supplements and are not intended to diagnose, treat, cure or prevent any disease. Always read the label and take as directed. Dietary supplements are not a replacement for a balanced diet. If symptoms persist, see your healthcare professional. Do not take Koru Sleep with antidepressant medication (SSRIs, SNRIs, MAOIs, tramadol) or St John's Wort without checking with your doctor or pharmacist. If you take medication for kidneys or diabetes, ask your pharmacist before adding magnesium. Not suitable during pregnancy or breastfeeding.
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Koru Sleep bottle and box
Koru Sleep + free Magnesium
From $49.99 a bottle · free delivery over $100
Start sleeping properly - from $59.99