Complete Guide · ROOTFUL™
Melatonin, explained: how the sleep hormone really works
It is not a sleeping pill, and it is not a “magic potion” either. Melatonin is your body's internal clock, a messenger that tells your brain night has fallen. Here is what the science (and EFSA) confirms, how to find the right dose for you, and exactly when and how to use it.
Chapter 1
What melatonin is and how it works
Melatonin is a hormone your body makes on its own, every night. It is secreted by the pineal gland, a pea-sized structure deep in the brain, under the command of the body's “master clock”: the suprachiasmatic nucleus (SCN) in the hypothalamus. In short, melatonin is not a sedative that “knocks you out”. As Cleveland Clinic explains, it is more of a chemical messenger that tells the body it is time to relax and get ready for rest.
Production starts from an amino acid: tryptophan is converted into serotonin, and some of that serotonin reaches the pineal gland, where, through a light-dependent process, it becomes melatonin. The key to the whole system is darkness. Light inhibits melatonin synthesis; darkness triggers it. That is why levels are very low during the day and rise in the evening, a hormonal signal that tells the brain “night has fallen”.
The detail that surprises everyone
Your body naturally produces only about 0.3 mg of melatonin a night, a subtle hormonal signal, not a “knockout blow” of sleep. That is exactly why the precision and quality of a supplement matter so much: you want an exact dose from a source you trust, not an approximate amount from a vague “blend”.
Light also explains why we feel sleepier in winter: long nights and short days prolong melatonin secretion. And with age, natural production falls and the rhythm can drift, one of the reasons sleep becomes more fragile as we get older.
Chapter 2
What it does, and what it does NOT do
This is the most important distinction in this whole guide. Melatonin has a well-defined role, and plenty of roles that marketing attributes to it but that it does not fulfil.
What EFSA officially confirms
The European Food Safety Authority (EFSA) has approved only two health claims for melatonin:
1. “Melatonin contributes to the reduction of time taken to fall asleep.”: an effect confirmed at a dose of 1 mg, taken close to bedtime.
2. “Melatonin contributes to the alleviation of subjective feelings of jet lag.”: at a dose of at least 0.5 mg, close to bedtime.
Notice what these claims do not say. Melatonin helps you fall asleep faster and regulate your rhythm, but nowhere is it described as a treatment that keeps you asleep all night or that cures insomnia. This is the essential distinction:
- It is not a sedative. It does not “anaesthetise” you or dull your reflexes the way classic sleeping pills do.
- It works on falling asleep, not on how long you sleep. It helps the brain switch into “night” mode; it does not guarantee unbroken sleep.
- It is not a treatment for chronic insomnia. According to the American Academy of Sleep Medicine (AASM) and NCCIH (NIH), the evidence is not strong enough to recommend it as a treatment for chronic insomnia.
- It is not a supplement for anxiety. It acts on the circadian rhythm, not on daytime anxiety.
The practical conclusion: melatonin is most useful when your problem is one of timing: you fall asleep too late, you have crossed time zones, you work shifts. Not when you cannot sleep for other reasons (stress, pain, apnoea). For those situations, see chapter 5.
Chapter 3
The right dose: how to find what works for you
Unlike a sleeping pill with a fixed dose, melatonin works across a range, and the right dose depends on how responsive your body is. The effective range documented in studies is 1 to 5 mg, taken 30 to 60 minutes before bed.
Some people respond to low doses. Others, especially those whose rhythm is all over the place, feel nothing below a certain threshold. This is where we have to be clear about what a label is allowed to say and what it is not. There is only one authorised claim in the European Union: “Melatonin contributes to the reduction of time taken to fall asleep”, and the effect is confirmed from 1 mg taken close to bedtime. That is all. There is no authorised claim saying 5 mg works better than 1 mg, and we are not allowed to say so either. What can honestly be said is that the range studied goes up to 5 mg, that the literature shows no benefit above that threshold, and that more just means more side effects.
| Dose | Category | Who it is for |
|---|---|---|
| 0.5-1 mg | Low dose | A starting point for very sensitive people. 1 mg is the minimum dose at which EFSA confirms the effect. |
| 1-3 mg | Medium dose | The intermediate range, suitable for some people. |
| 5 mg | Full dose (full strength) | The standard dose, at full strength. Supported by Cochrane for falling asleep faster and better sleep, for those who want the full effect. |
| above 5 mg | Not recommended routinely | No proven additional benefit; more side effects. Only on a doctor's recommendation. |
The advantage of flexible dosing
A full ROOTFUL serving is 2 gummies = 5 mg, at full strength. But because you dose in gummies, you are in control: you can start with a single gummy (~2.5 mg) if you want to test your sensitivity, then move up to the full 2-gummy serving for the full effect. Take them 30 to 60 minutes before bed, and if you wake up feeling “foggy” in the morning, it is easy to go back to one gummy.
Chapter 4
The perfect timing: when to take it
With melatonin, timing matters almost as much as the dose. For the classic effect of falling asleep faster, the confirmed window is 30 to 60 minutes before your intended bedtime. Taken at random during the day, it can cause unwanted drowsiness and throw your rhythm off.
There is, however, a second, more subtle role: shifting the circadian rhythm. If you chronically fall asleep too late (see “delayed sleep phase” in the next chapter), melatonin taken earlier in the evening can gradually “move” your internal clock earlier. Here, the exact timing matters more than the dose, and a personalised strategy is worth discussing with a doctor. If your clock shifted while you were on holiday, we have written separately about getting back to a sleep routine after a holiday.
The screen trap
Light, especially the blue light from phones and laptops, suppresses natural melatonin production and can cancel out the effect of the supplement. If you take melatonin and then scroll on your phone for another hour, you are working against your own ritual. Darkness is melatonin's ally.
A full serving of 5 mg melatonin (2 gummies), at full strength, with the freedom to start with a single gummy. A pleasant taste, sugar-free, gluten-free, with the dose clearly printed on the pack. Your evening ritual reduced to two steps: the gummies, then lights out. The exact opposite of “secret formulas”.
View the product →Chapter 5
Who it works best for
Melatonin is not for everyone who has a bad night. It shines when the problem is one of timing of the internal clock. Choose the situation that fits you:
Jet lag: crossing time zones
This is the situation with the strongest support. EFSA explicitly confirms melatonin's role in alleviating subjective feelings of jet lag, and the effect is more pronounced when you cross several time zones heading east.
Night shifts and changing schedules
The evidence is more mixed here than for jet lag (NCCIH notes it is not strong enough), but melatonin can help “anchor” daytime sleep. Total darkness in the bedroom during the day is just as important as the supplement.
Delayed sleep phase (you always fall asleep very late)
If you naturally fall asleep at 2 or 3 in the morning and struggle to wake up, your internal clock is “shifted” late. Melatonin taken earlier in the evening can help move it gradually earlier; here timing matters more than the dose, ideally under a doctor's guidance.
Occasional difficult nights
A busy spell, a mind that “won't switch off”, an evening when you just cannot wind down. For occasionally falling asleep faster, low-dose melatonin is a simple option, not for every night indefinitely, but as targeted support.
Winter and long dark evenings
In winter, many people's rhythm goes haywire: early darkness, sunless mornings, irregular hours. Low-dose melatonin can help re-anchor your bedtime, combined with natural light exposure in the morning, which is the most powerful “reset” for the internal clock.
Chapter 6
Safety, myths and contraindications
The good news: for most adults, melatonin used in the short term (up to about 3 months) is considered safe. Unlike classic sleeping pills, it is not habit-forming, does not cause withdrawal symptoms when you stop and, according to the literature (PMC/NIH), does not suppress natural production in the short term. The myth that “if I take melatonin, my body will stop making it” is not supported by evidence for short-term use.
Possible side effects
Usually mild and dose-related: next-day drowsiness, headaches, dizziness, nausea and sometimes very vivid dreams. More rarely: irritability, a brief mildly low mood or stomach cramps. Almost all of them ease when the dose is lowered.
Melatonin vs. a classic sleeping pill
- Acts on the circadian rhythm
- Ideal for jet lag and timing problems
- Low risk of dependence
- Available without a prescription
- Side effects usually mild
- Acts as a direct sedative
- For moderate or severe insomnia
- Higher risk of dependence
- Requires a prescription
- Morning “fog” more likely
Who should avoid it or check with a doctor first
Pregnancy and breastfeeding: safety has not been established, do not use without medical advice. Children: only on the recommendation and under the supervision of a doctor; not recommended under the age of 5 (as it is a hormone, there are questions relating to development and puberty). Older adults: greater sensitivity to drowsiness/dizziness; avoid in dementia. Interactions: if you take sedatives, anticoagulants, blood pressure medication or immunosuppressants, talk to your doctor or pharmacist first. And if your insomnia has lasted more than a month or has an underlying cause, melatonin is not the answer: book an appointment.
Chapter 7
How to choose a good melatonin supplement
Here is an uncomfortable truth about the market: melatonin is regulated as a food supplement, not as a medicine, and quality control varies enormously. NCCIH (NIH) cites an analysis in which, for most of the products tested, the actual amount of melatonin did not match the amount on the label. In other words, “5 mg” on the pack could mean anything.
That is why, with a hormone where the dose matters so much, it matters enormously where you get it from. What to look for:
- A clear, precise dose, printed on the pack, not vague “blends”.
- Manufactured to GMP standards (Good Manufacturing Practices).
- A dose within the effective range (1 to 5 mg), avoiding 10 mg+ “mega-doses”, which bring no additional benefit.
- A clean ingredient list, with no surprises.
This is exactly the principle ROOTFUL is built on: a transparently stated dose, so what you see on the label is what you get. Because with melatonin, precision beats size.
Chapter 8
1 mg or 5 mg melatonin
It is the most common question we get, and it usually follows a disappointment: someone took 1 mg tablets from the pharmacy, felt nothing, and concluded that melatonin does not work for them.
The honest answer has two halves. The first: 1 mg is the dose at which the effect has been confirmed, and it is the only figure European legislation links to the authorised claim. If 1 mg is enough for you, there is no reason to take more. The second: the range used in studies goes up to 5 mg, and above that threshold there are no extra benefits, just more frequent side effects.
What actually happens in most “it didn't work” cases has nothing to do with milligrams. It comes down to timing and light. Melatonin taken at random, or taken correctly and followed by an hour on your phone in bed, works against itself, because light suppresses exactly the signal you are trying to send. Before you increase the dose, move the time and switch off the screen.
How to decide, in practice
Start low. Our full serving is two gummies, which is 5 mg, but because you dose in gummies you can start with just one and see how you respond. If one gummy is enough, stay there. If you wake up with a heavy head in the morning, go down. The right number is the lowest one at which things work, not the highest one on the shelf.
Chapter 9
Frequently asked questions
Is 1 mg or 5 mg melatonin better?
Is melatonin habit-forming?
How long before I feel the effect?
Can I take melatonin every night?
Can I combine it with my medication?
How much does the dose matter?
Does melatonin help with anxiety?
Sources
- National Center for Complementary and Integrative Health (NIH), Melatonin: What You Need To Know
- EFSA, Scientific opinions on health claims for melatonin (reduction of sleep onset latency; jet lag)
- Mayo Clinic, Melatonin
- Sleep Foundation, Melatonin & Melatonin Dosage
- Cleveland Clinic, Melatonin: What It Is, What It Does & How It Works
- American Academy of Sleep Medicine (AASM), Guidelines on the treatment of insomnia
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