A Science-Led Look at Melatonin vs CBD
Is Melatonin Safe Long Term?
Melatonin has become one of the most widely used sleep aids in the world. In the US, one in four adults report using it as a sleep aid, reflecting how mainstream nightly supplementation has become. Despite being prescription-only in the UK, melatonin prescribing has increased almost ten-fold in England over the past decade.” That difference alone raises an important question:
Is melatonin safe long term and is it the most sustainable solution for restoring deep, natural sleep?
As melatonin use has grown, so have discussions around dosage accuracy, hormonal impact, and whether introducing a sleep hormone nightly is the right approach for modern sleep challenges.
At Dreem Distillery, we believe sleep isn’t something to force. It’s something to regulate.
What Is Melatonin?
Melatonin is a hormone produced naturally by the pineal gland in the brain in response to darkness. It plays a central role in regulating the circadian rhythm, the body’s internal 24-hour clock that governs when we feel alert and when we feel ready for sleep.
Often referred to as the “hormone of darkness,” melatonin levels begin to rise one to three hours before habitual bedtime, signalling to the brain that night has arrived.
In other words, melatonin does not sedate you. It sets the timing.
Melatonin supplements contain synthetic melatonin designed to replicate this natural signal.
Melatonin does not directly calm the nervous system. It does not quiet stress or reduce cortisol. It is, fundamentally, a clock-shifting tool.
When Is Melatonin Helpful?
Research suggests melatonin may be useful for:
• Jet lag
• Shift work
• Delayed sleep-phase disorder
For general insomnia, studies show modest improvements in falling asleep, but limited evidence of significant improvements in overall sleep quality or long-term restorative depth.
Is Melatonin Safe Long Term?
Short-term use in healthy adults is generally considered well tolerated. (A few days/couple of weeks)
Commonly reported side effects include:
• Daytime grogginess
• Headaches
• Dizziness
• Vivid dreams
• Nausea
Long term use is currently receiving a lot of opinions and early scientific data that suggests that melatonin is harmful longer term.
"Introducing melatonin from supplements in higher than physiological doses can alter your body’s natural signalling so
use with caution"
Andrew Huberman
Melatonin interacts with several biological systems, including endocrine and metabolic pathways. Ongoing research continues to explore its broader physiological effects.
It is also worth noting that in countries where melatonin is sold as a supplement, independent testing has shown significant variation between labelled and actual dosage in some products.
This may help explain why, in the UK, melatonin is regulated as a prescription-only medicine.
Why Dose Matters?
Many over-the-counter melatonin supplements contain doses between 3-10mg. Natural physiological nighttime levels in the bloodstream are significantly lower.
Higher doses do not necessarily improve sleep outcomes and may increase the likelihood of next-day grogginess in some individuals.
"Melatonin supplements are not well regulated... concentrations ranged from 83% less to 478% more than what was stated on the label"
Dr Matthew Walker
More is not always better particularly when influencing hormonal signalling.
Is It a Melatonin Deficiency or a Stress Issue?
For many people, chronic sleep disruption isn’t caused by insufficient melatonin production.
Instead, it’s linked to:
• Elevated evening cortisol
• Chronic stress/anxiety
• Nervous system dysregulation
• Excess artificial light exposure
• Irregular sleep timing
Melatonin vs CBD: What’s the Difference?
Melatonin works by influencing circadian rhythm timing.
CBD (cannabidiol) works through a different biological system entirely (the endocannabinoid system) which plays a role in regulating stress response, mood balance, inflammation and sleep-wake cycles.
Unlike melatonin:
• CBD is not a hormone, it is a botanical extract
• It does not shift your circadian clock
• It does not act as a sedative
Emerging research suggests CBD may support:
• Nervous system regulation
• Relaxation signalling pathways
• Emotional balance
• A calmer internal environment conducive to sleep onset
For individuals who feel “wired but tired,” supporting regulation may be more relevant than shifting the clock.
Melatonin vs CBD Comparison
A More Sustainable Path to Sleep...
Melatonin has a place particularly for short-term circadian disruption.
"Melatonin helps schedule the timing of your sleep but does not significantly change the quality of sleep itself"
Dr Matthew Walker
But for ongoing, stress-driven sleep challenges, focusing on nervous system balance may offer a more sustainable long-term strategy.
Foundational support includes:
• Morning daylight exposure
• Consistent sleep-wake timing
• Reduced evening screen exposure
• Intentional wind-down rituals
• Botanical support aligned with natural physiology
At Dreem Distillery, our formulations including Night Drops are designed to support calm and nervous system regulation, without introducing synthetic hormones.
Final Thoughts: Is Melatonin Safe Long Term?
Current evidence suggests short-term use of melatonin is generally well tolerated in healthy adults. Long-term nightly use remains an area where more research is needed.
Understanding what melatonin does and what it doesn’t do allows for more informed decisions.
If your sleep challenges are rooted in stress rather than timing, supporting regulation rather than shifting your internal clock may be worth exploring.
This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting or changing any supplement.
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