Melatonin: What It Is, How It Works, and Why It Helps You Sleep
Melatonin is one of the most studied sleep supplements in the world. Here is a plain-language guide to what it actually does, what the research says, and how to use it effectively.
- Melatonin signals sleep timing - it does not knock you out
- Lower doses (0.5-3mg) are often more effective than higher ones
- It works best when taken 30-60 minutes before your target sleep time
- Melatonin is non-habit forming - your body does not stop producing its own melatonin with supplementation
What is melatonin?
Melatonin is a hormone produced naturally by your pineal gland - a small structure in the centre of your brain. Its primary job is to signal to your body that it is time to sleep. It does not cause sleep directly. Instead it changes your biological state from alert to ready-for-sleep.
Your body begins producing melatonin as daylight fades, typically around 2 hours before your natural sleep time. Levels rise through the night, peak in the early morning hours, and then drop as light exposure increases. This daily cycle is called the dim-light melatonin onset, or DLMO.
Why modern life disrupts melatonin
The problem is that modern life is extraordinarily good at suppressing melatonin production at exactly the wrong time. The primary culprit is light - specifically the blue-spectrum light emitted by phone screens, laptops, televisions, and most LED lighting.
Your brain cannot distinguish between sunlight and the light from your phone screen at 11pm. Both send the same signal: it is daytime, stay alert. Melatonin production is suppressed. Your sleep is delayed.
This is not a minor effect. Studies have shown that 2 hours of evening screen exposure can suppress melatonin by up to 23% and delay sleep onset by over 1.5 hours.
How melatonin supplementation helps
Supplemental melatonin works by reinforcing the signal your brain is trying to send - and in many people, struggling to send effectively.
It is particularly useful for:
Delayed sleep onset - if you lie awake for 30-60 minutes after going to bed, your melatonin signal may be arriving late or being suppressed. Supplementation at the right time can restore appropriate timing.
Shift workers and frequent travellers - people whose light exposure does not match their natural day-night cycle benefit significantly from melatonin supplementation to reset circadian timing.
Stress-related sleep disruption - high cortisol inhibits melatonin production. People going through stressful periods often find melatonin helpful as a temporary bridge.
The dosage question
One of the most counterintuitive findings in melatonin research is that more is not better. Studies consistently show that doses of 0.5mg to 3mg are as effective as - and often more effective than - doses of 5mg to 10mg.
The reason is that your melatonin receptors can become saturated at higher doses, reducing sensitivity over time. A smaller dose that more closely mimics your body's natural production curve is more effective than a large dose that overshoots it.
Melly contains 3mg per gummy - at the top of the optimal evidence-based range.
Timing matters
Melatonin is a timing signal, not a sleeping pill. Taking it at the right time is as important as the dose.
The general guidance is to take melatonin 30 to 60 minutes before your target sleep time. This gives the hormone time to reach the receptors and begin the physiological transition toward sleep.
Taking it too early (more than 2 hours before bed) can shift your circadian rhythm in unhelpful ways. Taking it right at bedtime reduces its effectiveness.
Is it habit-forming?
No. This is one of the most important things to understand about melatonin. It is not a sedative and it does not create chemical dependency.
Your brain does not reduce its own melatonin production because you are supplementing. Studies on long-term melatonin use show no reduction in endogenous production and no withdrawal effects when stopping.
This is fundamentally different from prescription sleep medications like benzodiazepines or z-drugs, which do create dependency and rebound insomnia on stopping.
Combining melatonin with other ingredients
Melatonin works well in combination with other natural sleep support ingredients. The most evidence-backed combinations are:
Melatonin + Ashwagandha - melatonin addresses sleep timing while ashwagandha addresses the cortisol-driven wakefulness that prevents deep sleep. Together they target two of the most common causes of poor sleep simultaneously.
Melatonin + Chamomile - chamomile's apigenin acts on GABA receptors to produce a calming effect, making it easier to reach the relaxed state from which melatonin can then guide you into sleep.
This is the combination in every Melly gummy.