The Huberman Sleep Stack in Europe: What to Buy, What to Skip, and Exact Doses

Andrew Huberman has talked about his sleep supplement protocol across multiple podcast episodes, and by now most people in the optimization space have heard of it. Three compounds. Taken 30–60 minutes before bed. Done.

The problem? Most of the content covering this stack was written for a US audience, pointing you toward Amazon Prime shipping and melatonin you can buy at a gas station. If you're in Germany, the Netherlands, Norway, or anywhere else in Europe, that doesn't help you. Melatonin legality varies by country. iHerb import duties are a real consideration. And several of the branded products Huberman mentions don't ship to the EU at all.

This post covers the actual Huberman protocol, the science behind each ingredient, what's legally available where you live, and how to build the stack on a European budget — with specific vendors and realistic price ranges.

What Huberman Actually Recommends: The Core Protocol

Huberman introduced the core sleep stack across Huberman Lab Episode 84 — Sleep Toolkit and has since repeated and refined it in other episodes and interviews. The foundation is three compounds:

A few additional compounds he mentions less frequently:

• Inositol (Myo-Inositol): 900 mg, every 3–4 nights. Primarily for waking mid-sleep — helps you fall back asleep faster.
• GABA: 100 mg, 3–4 nights per week. He considers this a "hard hit" and doesn't recommend regular use.
• Glycine: 2 g, 3–4 nights per week. Occasional, not nightly.

His stated hierarchy: start with magnesium alone. If you're still struggling to fall asleep, add L-theanine. Add apigenin last. He explicitly advises against stacking everything from day one.

One thing Huberman does not recommend: melatonin. His reasoning is that even low doses of supplemental melatonin (typical US products are 1–10 mg) result in pharmacological levels far above what the brain naturally produces. He notes that melatonin tells the body when to sleep — it doesn't put you to sleep — and that relying on it can erode your natural signaling. This position happens to align perfectly with European regulations, where melatonin is largely restricted to prescription use.

Why European Buyers Face a Different Problem

The US version of this conversation is simple: order from Amazon or Momentous (Huberman's sponsor). Done.

In Europe, you're dealing with:

1. Melatonin is not a free-for-all. In most EU countries it's prescription-only or tightly restricted as a food supplement. In the UK and Switzerland it's prescription-only entirely. More on the country-by-country breakdown below.
2. Customs and import duties. iHerb ships to Europe and typically absorbs import duties on smaller orders, but this varies by country and basket size. Expect VAT to be applied at checkout.
3. Product availability. Several brands Huberman name-drops (Momentous, Thorne, Magtein direct) either don't have EU distribution or charge significantly higher prices once shipping and duty are accounted for.
4. Dosing confusion. EU products sometimes label magnesium differently — they'll show elemental magnesium content, not the total compound weight. A label saying "144 mg magnesium" from magnesium L-threonate is the equivalent of ~2,000 mg Magtein®. These are the same thing stated differently.

The good news: all three core compounds — magnesium, apigenin, and L-theanine — are freely available across the EU and UK as food supplements. None are restricted.

Melatonin in Europe: The Country-by-Country Reality

Since Huberman doesn't recommend melatonin anyway, this matters most for understanding what you don't need to source. But if you're curious about legality:

Sources: Molecules / MDPI (2025), JCSM / NIH (2017)

Practical implication: If you're in Germany, the UK, the Netherlands, or Switzerland and you want to follow the Huberman protocol as intended, you're already set — melatonin is off the table for practical purposes, and the three core compounds are all you need.

Breaking Down Each Compound

Magnesium L-Threonate (or Glycinate)

Magnesium is the workhorse of this stack. Huberman favors magnesium L-threonate (branded as Magtein®) because of its demonstrated ability to cross the blood-brain barrier — a property not shared by most other forms like magnesium oxide or citrate.

The science: A 2024 randomized controlled trial published in Sleep Medicine X (Hausenblas et al., 2024) tested 1 g/day of magnesium L-threonate (MgT) over 21 days in adults with sleep complaints. MgT improved both subjective and objective sleep scores, including deep sleep and REM stages measured via Oura Ring, alongside improvements in daytime mood, energy, and mental alertness. A 2025/26 Frontiers in Nutrition trial (Lopresti & Smith, 2026) found a 7.5-year reduction in estimated brain cognitive age and improved working memory over six weeks at 2 g/day.

Magnesium glycinate as a budget alternative: Huberman explicitly acknowledges glycinate (also called bisglycinate) as a valid substitute. It doesn't have as much sleep-specific research as threonate, but it's well-tolerated, has good absorption, and costs significantly less. His suggested dose for glycinate is 200 mg of elemental magnesium.

Dose: 144 mg elemental magnesium from ~2,000 mg Magtein® (threonate), or 200 mg elemental magnesium as glycinate.

Apigenin

Apigenin is a flavonoid found in chamomile and other plants. At 50 mg — the dose Huberman uses — it functions as a mild anxiolytic, quieting mental chatter before sleep rather than sedating you directly.

The science: Apigenin works primarily through GABAergic pathways. Research published in Frontiers in Nutrition (Kramer & Johnson, 2024) confirmed that apigenin demonstrates GABAergic activity via the GABA-A receptor, and that dietary apigenin intake correlates positively with sleep quality in a large cohort of adults. Animal studies show clear sedative effects; human trials using chamomile extract (apigenin's natural source at ~1% concentration) report improved anxiety scores and modest benefits for daytime functioning in insomnia patients.

The mechanism is distinct from benzodiazepines: apigenin engages GABA-A receptors but via different binding sites, which is why it produces relaxation without the tolerance, dependency risk, or cognitive blunting of pharmaceutical sleep aids (Gazola et al., 2015).

Note for women: Huberman has flagged that apigenin has estrogenic modulation effects. Women with hormone-sensitive conditions should consult a healthcare provider before using it regularly.

Dose: 50 mg, 30–60 minutes before bed.

L-Theanine

L-theanine is the amino acid responsible for much of green tea's calming effect. Unlike the other two compounds, theanine works acutely — you feel it within 30–60 minutes. It increases alpha brain wave activity (associated with relaxed alertness) and blunts the physiological stress response without causing drowsiness.

The science: A rigorous crossover RCT (Hidese et al., 2019) — randomized, placebo-controlled, double-blind — found that 200 mg/day L-theanine over four weeks significantly reduced PSQI (Pittsburgh Sleep Quality Index) scores, with improvements in sleep latency, sleep disturbance, and use of sleep medication. A 2024 trial (Moulin et al., 2024) using 400 mg/day for 28 days found significant improvements in sleep quality and reduced perceived stress.

One caution: Huberman himself notes that L-theanine intensifies dream vividness in some users and is contraindicated for people who experience night terrors or sleepwalk. If you wake up mid-sleep feeling anxious or your dreams become too intense, theanine is the first thing to pull from the stack.

Dose: 100–300 mg. Start at 100–200 mg if you're new to it.

Budget EU Version vs. Optimal Version

Here's where to spend and where to save.

Budget EU Version (~€25–35/month)

Swap magnesium L-threonate for magnesium glycinate, which costs a fraction of the price with similar sleep-relevant benefits. Source L-theanine as a bulk powder rather than capsules. Apigenin pricing is similar regardless of version.

Optimal Version (~€50–70/month)

Magnesium L-threonate (Magtein®-based), standardized apigenin capsules, and capsule-form L-theanine from a verified EU supplier.

EU Vendor Recommendations

Sunday Natural (sunday.de) — German brand, EU-focused, strong quality control, ships across EU. Their Apigenin Camomile Flower Extract is exactly 50 mg apigenin per capsule — the Huberman dose out of the box, no splitting required.

Life Extension Europe (lifeextensioneurope.com) — EU warehouse. Their Neuro-Mag® uses Magtein® (the patented MgT form from the research) dosed at 3 capsules/day providing 144 mg elemental magnesium. Priced at approximately €46 for a 30-day supply. This is the premium option.

iHerb (iherb.com) — Wide selection, ships to all EU/UK countries. Best for sourcing NOW Foods or Nutricost L-theanine in capsule form at competitive prices. Their pricing for Life Extension Neuro-Mag is around $39 (USD) before EU VAT. Factor in VAT for your country.

Bulk (bulk.com) — UK-based, ships to EU post-Brexit with duty handled. Best for bulk L-theanine powder and magnesium glycinate capsules if you're going the budget route. Their L-theanine capsules (250 mg) are a straightforward option.

HSN Store (hsnstore.eu) — Spain-based, ships EU-wide. Carries a standalone 50 mg apigenin capsule product at competitive pricing.

Dosing Table: Timing and Sequence

Build incrementally: Week 1 — magnesium only. Week 2 — add theanine if sleep is still shallow. Week 3 — add apigenin if onset is still slow. This approach isolates which compound is doing the work for you and avoids confounding any side effects.

Take a night off occasionally. Huberman recommends skipping every 4–6 weeks to assess whether you've developed psychological dependency.

FAQ

Is the full Huberman sleep stack legal to buy in Germany?

Yes. Magnesium L-threonate, apigenin, and L-theanine are all sold legally as food supplements across the EU, including Germany. None are subject to prescription requirements. The only compound in this conversation that has legal complications in Germany is melatonin — and the Huberman protocol doesn't use it.

Can I take this stack if I'm in the UK?

Yes. All three compounds are freely available as food supplements in the UK. L-theanine is sold by Nature's Best and Holland & Barrett. Apigenin is available from UK-based and EU vendors that ship to the UK. Magnesium L-threonate ships via iHerb and Life Extension Europe. Melatonin, however, is prescription-only in the UK — but again, it's not part of this stack.

Do I need all three compounds, or can I pick one?

You can absolutely start with one. Magnesium is the lowest-risk starting point with the broadest research base. L-theanine is the fastest-acting and most immediately noticeable. Apigenin has the most limited standalone human evidence, though animal data and chamomile extract trials are promising. If cost is a concern, start with magnesium glycinate + theanine and skip apigenin initially.

Is magnesium glycinate actually worth it as a substitute for L-threonate?

It depends on what you're trying to achieve. If you're primarily after sleep quality and the price of Magtein® is a barrier, glycinate is a reasonable substitute. The deep cognitive benefits (working memory, brain age) shown in MgT studies are specific to the threonate form's ability to cross the blood-brain barrier. For sleep specifically, the gap between forms is less dramatic. Glycinate is also gentler on digestion.

Will L-theanine make my dreams more intense?

For a meaningful minority of users, yes. Huberman is transparent about this — theanine increases dream vividness and can cause nightmares in those prone to them. If you find your dreams becoming disturbing or you wake up more often, drop theanine from the stack. The magnesium + apigenin combination is still effective without it.

Should I combine this with melatonin if I can get it?

Huberman's explicit position is no — at least not regularly. His concern is pharmacological overdosing (most OTC melatonin is 1–10 mg when the physiological dose is in micrograms) and disruption of your body's natural melatonin synthesis. If you're using melatonin for jet lag or acute sleep disruption during travel, that's a different context. For nightly use, the three-compound stack is designed to work without it.

How long until I notice an effect?

L-theanine is fast — most people feel something within one to two sleep cycles of starting. Magnesium typically takes one to two weeks of consistent use before the sleep benefits become noticeable, consistent with the 21-day and 6-week study protocols in the research. Apigenin's effects are subtle and cumulative — don't expect a dramatic shift in the first few days.

What to Skip

A few compounds you'll see bundled into "sleep stacks" sold by supplement brands that aren't part of Huberman's core protocol and have weaker evidence for most people:

• Valerian root: Inconsistent evidence. Some trials show benefit, others don't. Not part of Huberman's recommended protocol.
• 5-HTP: Serotonin precursor. Can have mood effects and interacts with antidepressants. Skip unless working with a clinician.
• High-dose melatonin (1–10 mg): Not recommended by Huberman, and largely prescription-only in Northern and Central Europe anyway.
• Proprietary sleep blends: Any blend where you can't see individual ingredient doses is worth avoiding. You need to titrate these compounds individually to understand what works for you.

The Bottom Line

The Huberman sleep stack — magnesium L-threonate, apigenin, L-theanine — translates cleanly to the European market. All three compounds are legal and available. The main adaptation is sourcing: use Life Extension Europe or iHerb for MgT, Sunday Natural or HSN Store for apigenin, and Bulk or iHerb for theanine.

If you're cost-conscious, swap threonate for glycinate and buy L-theanine as a bulk powder. You lose some of the cognitive upside of MgT, but the sleep benefit holds up. The research on both forms supports better sleep outcomes.

Don't overthink the melatonin situation — the protocol works without it, which happens to be convenient given that melatonin is effectively inaccessible in most of Northern Europe without a prescription anyway.

Start with one compound, give it two weeks, and add from there.

This post is for informational purposes. None of the above constitutes medical advice. Consult a healthcare provider before adding supplements to your routine, particularly if you take medications or have an underlying health condition.