A nightly ritual to unwind and get ready for bed.
Serune is a grounding, ceremonious ritual to round off your day and mark that the night's begun.
Dissolve one sachet into hot water, or any milk you prefer, and you've got an indulgent dark chocolate drink made with real cacao, subtle hints of Madagascar vanilla and Montmorency tart cherry. An intentional ritual you'll actually look forward to every night.
A nightly ritual redefined.
We spent a long time on this formula, because we are committed to designing something built around the architecture of a full night, and the day that follows it.
Instead of sprinkling a pinch of a long list of ingredients, we wanted each one to count.
Every dose is clearly listed, so you’ll know exactly what’s stirred into your evening ritual, and exactly how much. After everything you’ve tried, here’s a formula you can finally scrutinise for yourself.
Eight actives, every dose on the label
Serune is high in magnesium and vitamin B6, which contributes to normal psychological function and to the reduction of tiredness and fatigue¹ ². It’s also high in zinc, which contributes to normal cognitive function.³ Alongside them are four botanicals and amino acids, each named and each dosed at the level used in the research.
No added melatonin, hormones, or sedatives
We left melatonin out on purpose. Serune is not designed to knock you out, and it contains nothing that would. What it does contain is magnesium and vitamin B6¹ ², both of which contribute to the reduction of tiredness and fatigue, in a form you drink rather than swallow.
Natural ingredients
Precisely-dosed premium plant botanicals, amino acids and minerals that are scientifically backed to work from within, delivered in a luxurious cacao ritual you’ll look forward to.
A consistent nightly ritual
One sachet each evening, for 28 nights. We’re not interested in quick fixes. This is a habit you build over time, the way most things worth doing actually work.
What’s inside matters
Eight actives. Named, precisely dosed, at their researched level. No proprietary blends, no hidden amounts. Every dose is on the label, the whole persuasion is the specificity.
Saffron (Safr'Inside™) · 30mg extract, standardised to ≥3% crocins
Saffron (Safr'Inside™) · 30mg extract, standardised to ≥3% crocins
Our signature, front-line ingredient, precisely dosed at 30mg — a branded, characterised extract.
Glycine · 3,000mg
Glycine · 3,000mg
A fundamental amino acid, at a full 3,000mg — a critical structural building block within your body's natural nighttime environment, working in synergy with our magnesium stack.
Magnesium · 150mg elemental (as fully reacted, chelated magnesium bisglycinate)
Magnesium · 150mg elemental (as fully reacted, chelated magnesium bisglycinate)
An essential mineral in a highly bioavailable bisglycinate form for superior absorption, so it actually reaches your system instead of sitting heavily in your stomach. Contributes to normal psychological function and to the reduction of tiredness and fatigue.
L-Theanine · 200mg (from green tea extract)
L-Theanine · 200mg (from green tea extract)
A targeted, non-drowsy amino acid naturally found in green tea — never the synthetic version — to support a calm, composed transition into evening rest.
Lemon balm · 400mg leaf extract, standardised to 7% rosmarinic acid
Lemon balm · 400mg leaf extract, standardised to 7% rosmarinic acid
A leaf extract of the lemon balm plant (Melissa officinalis), standardised to its rosmarinic acid, so every batch delivers the same 400mg at the same strength — not a variable pinch of loose herb.
Chamomile · 400mg extract, standardised to 3% total apigenins
Chamomile · 400mg extract, standardised to 3% total apigenins
A refined, concentrated herbal flower extract chosen for its naturally occurring apigenin, widely used to quieten central nervous system activity and soothe sensory noise — helping to wind down a racing mind.
Vitamin B6 · 2.8mg (as P-5-P)
Vitamin B6 · 2.8mg (as P-5-P)
Included in its active, co-enzymated form for immediate cellular utilisation. Contributes to the regulation of hormonal activity and normal psychological function.
Zinc · 10mg elemental (as zinc citrate)
Zinc · 10mg elemental (as zinc citrate)
A foundational dietary mineral supporting your system's overnight maintenance cycle, contributing to normal cognitive function.
Safr'Inside™
Saffron, long known as red gold, is one of the oldest and most precious spices in the world, and still the most expensive spice on earth. Most of what sells is generic; its strength is anyone's guess.
Ours is formulated with Safr'Inside™, a patented full-spectrum extract. Characterised for the compounds that define real saffron, its crocins, safranal and picrocrocin, and standardised so every batch matches the last.
It has been studied in randomised, placebo-controlled sleep trials, and we dose it at 30mg, the exact amount used in these trials. Not just a pinch for colour; rather, at a precise dose you can look up.
Safr'Inside™ · 30 mg · full-spectrum, characterised, standardised to ≥3% crocins
Lemon Balm
Lemon balm, Melissa officinalis L., has been used as an ancient remedy to relax the mind and ease the way into sleep for more than two thousand years. Its name, Melissa, is the Greek for honeybee, for the bees it was grown to draw.
Ours is a characterised extract, standardised to at least 7% rosmarinic acid, the compound on which its calming reputation has always rested. Standardised dose so the strength holds, unlike most sleep teas that use it loose and let it drift.
It has been studied in randomised, placebo-controlled sleep trials, and we dose it in full accordance with these studies, at 400mg per serving.
Lemon balm · 400 mg leaf extract · standardised to at least 7% rosmarinic acid
L-theanine
L-theanine, from the leaves of the tea plant, is the amino acid behind fine green tea's savoury depth, concentrated in the shade-grown leaves prized for matcha. It is valued enough that a cheap synthetic version is now everywhere.
Ours is the real thing, drawn from green tea, never the synthetic stand-in that fills the gap in most formulas. Unlike the leaf it comes from, it carries no added caffeine. We use the amino acid, not the stimulant, so nothing here works against the evening.
It has been studied in randomised, placebo-controlled sleep trials, and we dose it at 200mg of active compound, the level used across these studies. A precise dose you can look up for yourself.
L-theanine · 200 mg active compound · from real green tea extract, never synthetic
Chamomile
Chamomile is the bedtime herb everyone is familiar with, the one that has held its place in the evening for centuries. For most people it means a teabag and a mug, warm and familiar.
Ours is not the teabag. It is a characterised whole chamomile extract, the whole flower rather than a single compound pulled out of it, because the whole herb is what the research has always used. Where a cup is an infusion of unknown strength, steeped a little differently every time, ours is measured, so what is in one sachet is in the next.
A cup of chamomile is guesswork by the mugful. Ours is a set amount of a standardised extract, the same every night, at 400mg. The familiar herb, at a dose you can finally read off the sachet.
Chamomile · 400 mg · whole chamomile, standardised to 3% total apigenins
Built for the women who fight for sleep at both ends of the night. Hear from the ones who tried it first. ★★★★★ 4.9 from 100 early testers.
We sent early packs to a small group of testers along the way, most of them women who've spent years watching disrupted sleep cost them the next day. Here is what they told us.
★★★★★
Tastes like proper drinking chocolate, not a supplement. I was expecting to have to force it down, but it tastes like a drink I'd make at the end of the night to unwind anyway.
- Zlatina, early tester
★★★★★
The tart cherry flavour is such a nice addition to the taste. Feels like I can enjoy a nightly treat with all the benefits that come with it.
- Ash, early tester
★★★★★
I have tried a lot of sleep supplements, but I still tend to wake up in the middle of the night. Since trying Serune, I've been feeling better rested and no longer dread evenings.
- Anne, early tester
Genuine early testers, unpaid. Individual experiences during testing; results may vary from person to person.
Your questions, answered simply and clearly.
Why not just take a magnesium tablet?
Because a tablet is one ingredient and Serune is eight. Each sachet contains 150mg of elemental magnesium as fully reacted, chelated magnesium bisglycinate, whereas many high-street tablets use magnesium oxide. Alongside it are Safr'Inside™ saffron, glycine, L-theanine, lemon balm, chamomile, vitamin B6 and zinc, each at the dose listed on the pack. And it is designed as a warm drink you make each evening, not a tablet you take and forget.
How is it different from chamomile tea?
Same evening warm beverage, but with very different contents. How much a tea bag gives you depends on the flowers, the water and how long you leave it. Serune contains 400mg of chamomile extract in every sachet, standardised to 3% total apigenins, alongside seven other actives at named doses.
How long before I know if it is for me?
Every sachet carries the full dose from the first night. What takes time is the habit. That is why we suggest three packs before you decide: long enough for the ritual to settle, and long enough for you to judge it honestly.
Why does it cost what it does?
Because of what is intentionally included in each sachet. Eight actives, each at a named dose, with the botanicals as standardised extracts, so every sachet carries the same measured amount as the last. Every batch of material that goes into it comes with a Certificate of Analysis, and it is made in a BRCGS AA-graded facility: the food safety standard UK supermarkets require of their suppliers, at its top grade.
Can I take it with medication, or while pregnant?
Serune is not recommended during pregnancy or breastfeeding, and is not suitable for children. If you take any medication or are under medical supervision, speak to your doctor or pharmacist before taking any food supplement. To check a specific ingredient, email us, and we will answer directly.
Is there melatonin in it?
No added melatonin and no added hormones. That was a deliberate decision, not an omission.
How much caffeine is in it?
Very little. Cacao is in the formula for flavour, not as an active ingredient, in a small amount, so you get the rich, not-too-sweet taste without much of what comes with it. Cacao naturally contains theobromine and a trace of caffeine, and we do not add any on top of that. If you are sensitive to either, email us and we will send you the exact figures.
How do I store it, and how long does it keep?
Somewhere cool and dry, out of direct sunlight. The best-before date is printed on every pack.
When will my order arrive?
Pre-orders are dispatched from Monday 16 November 2026.
Once we are shipping, UK orders placed before 2pm on a working day are dispatched the same day, and after that the next working day. Standard delivery is Royal Mail Tracked 48 and usually arrives 2–3 working days after dispatch. It is free on orders of £35 and over, and always free on a subscription; below £35 it is £1.00.
At checkout you can upgrade to Priority (£1.97, Royal Mail Tracked 24, usually next working day) or DPD (£4.97, next working day with a one-hour delivery window and the option to redirect or leave safe).
Outside the UK, delivery is calculated at checkout and typically takes 5–10 working days in Europe and 7–14 working days elsewhere.
Why am I paying now for something that ships in November?
Because it is currently open only for pre-order as our first batch is still in the process of production. You are charged today (to lock in your pre-order pricing), we’ll dispatch from 16th November onwards, and you can cancel any time before it ships for a full refund.
Can I cancel a subscription?
Yes, at any time, in your account, in one click. No minimum term, no notice period, no phone call, no hidden charges. And if you have any further concerns, you can just reach out to us.
What if it is not for me?
Tell us within 30 days of your first pack arriving, and we will refund it. You keep the remainder of the pack. You won’t need to send anything back or fill in long forms to justify.
Where can I read the research behind the doses?
On the science page: every active, the amount in a sachet, the form we use and why, the published studies each dose was set against, and every authorised claim in full. https://www.serune.co.uk/pages/science
What exactly is in a sachet?
Eight actives in every sachet: saffron (Safr'Inside™) 30 mg extract standardised to ≥3% crocins; glycine 3,000 mg; magnesium 150 mg elemental as fully reacted, chelated magnesium bisglycinate; L-theanine 200 mg from green tea extract; lemon balm 400 mg leaf extract standardised to 7% rosmarinic acid; chamomile 400 mg extract standardised to 3% total apigenins; vitamin B6 2.8 mg as P-5-P; and zinc 10 mg elemental as zinc citrate, in a real cacao base with a Montmorency tart cherry note and Madagascar vanilla. There is no melatonin, no ashwagandha and no proprietary blend: every dose is on the label.
Is the saffron the same as in the studies?
Yes. Serune uses Safr'Inside™, the extract used in the two 2025 saffron sleep trials (Sleep Medicine: X, and the University of East Anglia), at the dose those trials used: 30 mg, which is the amount in one sachet. What the trials looked at, in the people they looked at, is on the science page.
What kind of magnesium is in Serune, and how much?
150 mg of elemental magnesium per sachet, as fully reacted, chelated magnesium bisglycinate. Elemental is the figure that matters: 150 mg of magnesium comes from roughly 1,150 mg of bisglycinate. That is 40% of the UK Nutrient Reference Value, so Serune is high in magnesium, and it is under the 250 mg a day supplemental ceiling. Magnesium contributes to a reduction of tiredness and fatigue and to normal psychological function.
Is the L-theanine natural?
Yes. Serune's L-theanine is extracted from green tea leaf (Camellia sinensis), the form with a history of use as a food. L-theanine made by chemical synthesis or fermentation is treated as a novel food and is currently going through authorisation; Serune does not use it.
What does "dosed to the research" mean?
For each active we found the form the human studies used and the amount they used, and matched it where the sachet allows. Glycine is 3 g because that is the dose in every human sleep study of glycine; saffron is 30 mg because that is the dose in the Safr'Inside™ trials; L-theanine is 200 mg because that is the dose in most of the human research; chamomile is 400 mg because that is the dose in the four-week sleep-quality trial. Where a trial used more than we do, the science page says so.
Which health claims can Serune legally make?
UK law only lets a food supplement make health claims that have been authorised. Three of Serune's eight actives hold authorised claims: magnesium, vitamin B6 and zinc, including "magnesium contributes to a reduction of tiredness and fatigue", "vitamin B6 contributes to the reduction of tiredness and fatigue" and "zinc contributes to normal cognitive function". Saffron, glycine, L-theanine, lemon balm and chamomile carry no authorised claim; we include them at researched doses and print exactly how much of each is in every sachet. The full list of authorised wordings is on the science page.
Is Serune tested?
Serune is made in the UK in a BRCGS AA-certified facility, the food safety standard the supermarkets audit against, at its highest grade. Every batch of material comes with a Certificate of Analysis, so the standardisation on the label is measured, not assumed. Serune contains none of the 14 declarable allergens and is gluten-free.
Why hot milk?
Because it makes the better drink and it is the ritual most people already keep. Serune makes no claim for milk, and hot water works too.
¹ Magnesium contributes to normal psychological function and to the reduction of tiredness and fatigue.
² Vitamin B6 contributes to the reduction of tiredness and fatigue.
³ Zinc contributes to normal cognitive function.
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