Melatonin shortens the time it takes to fall asleep: per EU guidance, 1 mg shortly before bedtime contributes to falling asleep faster; from 0.5 mg at the destination, it eases the subjective feeling of jet lag. The body's own sleep hormone is produced mainly in darkness — even small amounts are enough for the approved effect.
Melatonin has probably become the best-known „sleep helper" among food supplements – but how does the hormone actually work, how do you dose it and when is the best time to take it? The short answer: melatonin is a hormone your body produces itself that helps set the starting point of your sleep. Two claims are authorised in the EU – a shorter time to fall asleep at 1 mg shortly before bedtime and less perceived jet lag from 0.5 mg at your destination. Even these small amounts are enough; more is not better. This guide answers the most important questions and is no substitute for medical advice.
The key points at a glance
- Melatonin is a hormone the body produces itself that helps regulate the sleep-wake rhythm and is produced mainly in darkness.
- Authorised claim 1: helps to reduce the time it takes to fall asleep – at 1 mg shortly before bedtime.
- Authorised claim 2: helps to alleviate the subjective feeling of jet lag – from 0.5 mg close to bedtime at your destination.
- More is not better: even small amounts are enough for the sleep-onset effect.
- Melatonin can cause drowsiness – do not drive afterwards.
What is melatonin?
Melatonin is a hormone your body produces in the pineal gland in the brain – above all in darkness. It acts as a kind of „internal signal" for the night: when the level rises in the evening, the body attunes itself to rest; in the morning, with daylight, it falls again. This makes melatonin a central timekeeper of the circadian rhythm – your internal clock.
Artificial light, shift work, screens in the evening or crossing time zones can throw this rhythm off balance. This is exactly where melatonin as a food supplement comes in – not by sedating, but by supporting the body's own „night" signal. You can read how to embed it into a holistic evening routine in sleeping better naturally.
How the body produces melatonin itself
A look at the body's own production makes a lot of things easier to understand. The starting material is the amino acid tryptophan, which the body converts over several steps first into serotonin and finally into melatonin. This conversion takes place mainly in the pineal gland and is strictly controlled by light: when light falls on the retina, the brain throttles melatonin production; when it gets dark, production ramps up. This is why melatonin is so closely tied to the day-night cycle – it is literally the „darkness hormone". Anyone who understands this connection immediately sees why light in the evening and daylight in the morning have such a big influence, and why timing is so decisive when supplementing. You can find related background knowledge on tryptophan in L-tryptophan.
How does melatonin work? The two authorised claims
As a food supplement, melatonin is particularly well studied and carries two officially authorised health claims:
- Falling asleep: melatonin helps to reduce the time it takes to fall asleep – with an intake of 1 mg shortly before bedtime.
- Jet lag: melatonin helps to alleviate the subjective feeling of jet lag – for this, just 0.5 mg is enough, taken close to bedtime at your destination.
Melatonin is therefore not a classic sleeping pill that sedates – it supports the natural starting point of sleep. Why it is not a sedative or a habit-forming substance is explored in more depth in Is melatonin addictive?
The right dosage
With melatonin, one thing is special: a higher dose does not automatically do more. For the authorised sleep-onset effect, 1 mg is already enough, and many people get along well with this low amount. For the jet lag application, even 0.5 mg is sufficient. As a rule, stick to the dosage recommendation on the packaging.
| Application | Amount | Timing |
|---|---|---|
| Reduce time to fall asleep | 1 mg | shortly before bedtime |
| Alleviate jet lag | 0.5 mg | at your destination, at the local bedtime |
Why small amounts are enough and how to dose them reliably is explored in more depth in Melatonin: how much makes sense?
What throws the natural rhythm off balance
To understand when melatonin as a supplement comes into play, it helps to look at the typical factors that disrupt the internal clock. The biggest is light at the wrong time: bright, especially blue screen light late in the evening signals „still daytime" to the brain and can delay the natural rise of the body's own melatonin. Other factors are shift work, crossing time zones, irregular bedtimes and too little daylight in the morning. In all these situations the body's own rhythm is out of balance – and this is exactly where melatonin steps in as a supporting „night" signal, rather than simply sedating.
| Disruptive factor | What helps |
|---|---|
| Screen light in the evening | dim displays, reduce them 1–2 h before sleep |
| Too little daylight in the morning | get outside into daylight in the morning |
| Crossing time zones | melatonin as needed at your destination (0.5 mg) |
| Irregular times | fixed bedtimes and wake-up times |
When should you take melatonin?
Timing matters more with melatonin than with many other supplements, because the hormone triggers the moment of falling asleep:
- To fall asleep: shortly before going to bed – not hours in advance.
- For jet lag: at your destination, at the local bedtime, to guide the internal clock towards the new time zone.
More on the general timing of food supplements in Intake rhythm: morning or evening, and for travel in Jet lag & travel.
Dosage forms: drops, tablet or spray?
- Tablets/capsules are conveniently pre-dosed (e.g. 1 mg) and easy to build into the evening routine – often combined with magnesium, which contributes to the normal functioning of the nervous system.
- Drops allow for fine, individual dosing – handy if you want to adjust the portion precisely.
- Sprays allow flexible intake and are perceived by some as pleasant, especially when travelling.
Which form is right is above all a question of personal preference – details in Capsule, tablet, powder or drops. When comparing, pay less attention to the mere number on the pack than to whether the portion matches the authorised small amounts and whether you can reliably keep to the timing of intake.
Embedding melatonin sensibly into your evening routine
Melatonin unfolds its benefit best when it is part of a coherent evening routine – not as an isolated tablet meant to make up for a restless lifestyle. In concrete terms, that means: one to two hours before bedtime, dim the lighting and cut back on screens, because bright light slows down exactly the signal that melatonin is meant to support. During the day, make sure you get enough daylight, keep fixed bedtimes and wake-up times, and make the bedroom cool, dark and quiet. A small portion of melatonin shortly before going to bed fits harmoniously into this framework. If you also want to approach the evening in a more relaxed way, you will find further ideas in Stress & inner calm: magnesium & adaptogens; magnesium contributes to the normal functioning of the nervous system and muscles.
Melatonin when travelling: the jet lag case in detail
The second authorised use case deserves a closer look, because it plays a role in the everyday life of many frequent travellers. On a flight across several time zones, the internal clock gets out of sync: the body still produces its melatonin according to home time, while at the destination a different local time has long since applied. This is exactly where the authorised claim comes in – melatonin helps to alleviate the subjective feeling of jet lag when taken from 0.5 mg close to bedtime at your destination. In practice, this means: you take it in the evening according to the new local time, to guide the internal clock towards the destination time zone. Because this occasion ends by itself once you have adjusted, the jet lag application is naturally limited in time. You will find a compact travel guide in Jet lag & travel and further tips in Food supplements on the go.
What research is investigating & common misconceptions
Melatonin is one of the best-studied substances in the sleep context – which is precisely why the two authorised EU claims exist with their clear conditions. You should be aware of two widespread misconceptions: first, „more helps more" – wrong, even small amounts are enough for the authorised effect. Second, the worry about habituation – for short-term, intended use as a sleep aid, no potential for dependence is known; the medical assessment, however, remains a matter for professionals.
Safety & an honest perspective
Melatonin can cause drowsiness – after taking it, do not drive or operate machinery. During pregnancy and breastfeeding, as well as in children, only after consulting a doctor; in the case of pre-existing conditions or medication, clarify with a doctor beforehand. What is established is its role as the body's own timekeeper and the two authorised claims; everything else belongs in a conversation with your doctor. Food supplements are no substitute for a balanced diet and a healthy lifestyle – the best sleep arises in interplay with good sleep hygiene.
Suitable products & further guides
You will find melatonin in various forms in the Melatonin category. For a holistic evening routine, Sleep & inner calm and Valerian are worthwhile. Read on: How much melatonin makes sense?, Is melatonin addictive?, Melatonin vs. valerian, Jet lag & travel and sleeping better naturally.
Frequently asked questions (FAQ)
How does melatonin work?
Melatonin is a hormone the body produces itself that helps set the starting point of sleep. It does not sedate, but supports the body's natural 'night' signal. In the EU it is authorised that it reduces the time it takes to fall asleep (at 1 mg) and alleviates the perceived jet lag effect (from 0.5 mg).
How much melatonin should I take?
For the authorised sleep-onset effect, 1 mg shortly before bedtime is enough; for jet lag, 0.5 mg at your destination. More is not better – even small amounts are sufficient. Stick to the dosage recommendation on the packaging.
When is the best time to take melatonin?
Shortly before going to bed, not hours in advance, because melatonin triggers the moment of falling asleep. For jet lag, you take it at your destination at the local bedtime, to guide the internal clock towards the new time zone.
Can I still drive after taking it?
No. Melatonin can cause drowsiness, so you should not drive or operate machinery after taking it. During pregnancy, breastfeeding, in children, with pre-existing conditions or when taking medication, clarify with a doctor beforehand.
This article is for general information and is no substitute for individual medical advice.
Health notice: This guide is for general information purposes only and does not replace individual medical or pharmaceutical advice. Food supplements are not a substitute for a balanced, varied diet and a healthy lifestyle. If you have health concerns, are pregnant or breastfeeding, or are taking medication, please consult a doctor or pharmacist. How our guides are created →
Sources
- Melatonin-Containing Food Supplements Should Not Be Taken Uncritically — BfR (German Federal Institute for Risk Assessment), 2024
- Melatonin for Falling Asleep: How Useful Are Products Like Sprays? — Verbraucherzentrale (German Consumer Advice Center)
- Melatonin: What You Need To Know — NIH / NCCIH (National Center for Complementary and Integrative Health)
- Melatonin: Facts, Extrapolations and Clinical Trials — Biomolecules (PMC/NIH, peer-reviewed review article), 2023
