Posted by Bonita Yonevska
on October 08, 2026
Reviewed by Dr. Tracy Gibbs, PhD, Head of R&D · Last updated: 2026-10
If you can't fall asleep because your mind keeps racing, the usual reason is that your brain is still in daytime mode when your body is ready for bed. Unfinished tasks, bright screens, a late coffee and an irregular bedtime all keep that alert state going. The habits with the best evidence work on two fronts: they quiet the thinking before you lie down, and they teach your brain that bed is for sleep.
Why does my mind race when I try to sleep?
Sleep researchers describe a state called hyperarousal. In people who struggle to sleep, studies of heart rate, stress hormones and brain activity point to a nervous system that stays switched on through the evening and into the night. Worry and rumination are among the things that keep it running from one night to the next [1].
The content of those thoughts is rarely dramatic. It is the email you did not send, the call you have to make at nine, a sentence someone said at lunch. In a study of university students in England and Japan, poor sleepers spent more time worrying before sleep than good sleepers and more often said that thinking too much kept them awake. One of the statements they agreed with most was simple: "I am unable to empty my mind" [2].
Then the loop begins. You notice you are still awake, you check the time, you calculate how many hours are left. That calculation is one more thing to think about.
This article is about the first part of the night, getting to sleep. If you fall asleep easily but wake in the early hours, read why you wake up at 4am.
What keeps you awake at bedtime?
| Trigger | What happens | What to try |
|---|---|---|
| Unfinished tasks | Your brain keeps rehearsing tomorrow | Write a specific to-do list before bed |
| Screens in the last hours | Bright light delays your internal clock | Dim the lights, leave the phone outside the bedroom |
| Coffee after lunch | Caffeine is still active at bedtime | Stop coffee and tea at least six hours before bed |
| A nightcap | Sleep arrives faster, then breaks up later | Do not use alcohol as a sleep aid |
| A different bedtime every night | Your clock never gets a stable signal | Get up at the same time every day |
Light and screens. In a controlled laboratory study, adults who read on a light-emitting tablet for four hours before bed took longer to fall asleep, released less melatonin in the evening, had a later internal clock and were less alert the next morning than when they read a printed book [3].
Afternoon caffeine. Caffeine lasts longer than most people expect. When healthy sleepers took 400 mg of caffeine, roughly two to three cups of coffee, six hours before bed, their measured sleep was more than an hour shorter, and they did not notice the difference [4]. The NHS advises avoiding coffee and tea for at least six hours before bed [6]. If you need something for the afternoon, see focus without jitters.
Alcohol. A glass of wine can make you drowsy, and a review of the research found that alcohol does shorten the time it takes to fall asleep. The cost comes later: the second half of the night becomes more disturbed, and the authors conclude that alcohol should not be used as a sleep aid [5].
An irregular schedule. Late nights at the weekend and early alarms on Monday leave your body clock guessing. The NHS lists keeping regular sleep hours, including after a bad night, among the first steps for better sleep [6].
How to fall asleep faster: habits that hold up
Write tomorrow's to-do list. In a sleep laboratory study at Baylor University, 57 young adults spent five minutes before lights out writing either a list of tasks for the coming days or a list of tasks they had already finished. The to-do list group fell asleep faster, and the more specific their list, the faster they fell asleep [7].
Give your worries an appointment. Earlier in the evening, not in bed, take ten minutes and write down what is on your mind, with one next step for each item. Psychologists call this constructive worry, and a structured version of it has been studied in college students with insomnia [8]. When the same thought comes back at midnight, you can tell yourself it already has a plan and a time.
Keep the bed for sleep. This is the core of stimulus control, part of cognitive behavioral therapy for insomnia (CBT-I). The instructions are short: go to bed only when you feel sleepy, get out of bed if you cannot sleep, use the bedroom only for sleep and sex, wake up at the same time every morning and avoid daytime naps [9]. If you are awake and frustrated, go to another room, read something calm in dim light and come back when you feel sleepy.
Protect your wake-up time. Set one alarm for all seven days and keep it after a bad night too, as the NHS advises [6].
Make the last hour quieter. The NHS suggests winding down for an hour before bed, keeping the bedroom dark and quiet, and limiting screens before sleep [6].
For insomnia that has settled in, the American Academy of Sleep Medicine does not recommend sleep hygiene tips as a stand-alone approach. Its strongest recommendation goes to multicomponent CBT-I [9].
Where does melatonin fit?
Melatonin is the hormone your body releases as evening falls. Under EU law, one health claim is authorised for it: melatonin contributes to the reduction of time taken to fall asleep. The beneficial effect is obtained by consuming 1 mg of melatonin close to bedtime [10].
That is the amount in Z-z-Zen. Each strip combines 1 mg of melatonin with 14 mg of saffron extract, 12 mg of L-glycine and 12 mg of L-theanine, with a natural peppermint flavor and no sugar. You place it on your tongue 20 to 30 minutes before sleep and it dissolves in 7 to 30 seconds, with no water and no glass on the nightstand. For a closer look at each ingredient and why 1 mg, read inside the Z-z-Zen sleep formula.
The format matters too. Smart Strips are oral dissolvable strips made with QuickRelease™ film, which delivers up to 95% bioavailability, up to 4x faster absorption and up to 30% higher effectiveness than a swallowed tablet, capsule or powder. You can read how on our science page and in melatonin strips vs melatonin gummies.
Think of Z-z-Zen as the final step of the evening routine above. It works best on a night when the list is written and the phone is in the other room.
What about the racing mind during the day?
A busy head at 11pm often starts at 3pm. Anxiety is the Smart Strips formula for the stressful hours, with 20 mg of L-theanine, 20 mg of GABA and 10 mg of saffron extract in one strip, and it contains no melatonin. For the full routine, the Day and Night Reset set brings Anxiety for the day and Z-z-Zen for the night together. More ideas for the daytime side are in how to stay calm on a stressful day.
Smart Strips is the only oral strip brand with a complete functional range, from training and focus to sleep and longevity. See the full range.
When should you see a doctor?
A few rough nights after a hard week are part of life. The NHS recommends seeing a doctor if changing your sleep habits has not helped, if you have had trouble sleeping for months, or if poor sleep is making it hard to cope with daily life [6]. Insomnia that lasts three months or more is considered long term [6]. A doctor can rule out other causes and refer you to CBT-I, the approach the American Academy of Sleep Medicine recommends most strongly for chronic insomnia [9].
If you are pregnant or breastfeeding, take medication or have a medical condition, speak to your doctor before taking any supplement, including melatonin. Z-z-Zen is not for children, and because it contains melatonin it may cause drowsiness, so do not drive after use.
How Smart Strips are made
Smart Strips are made in the USA, in an FDA registered, cGMP certified facility certified to NSF/ANSI 455-2. Every formula is tested by independent ISO 17025 accredited laboratories. New to the format? Start with what oral dissolvable strips are.
FAQ
How can I fall asleep fast? Write a specific to-do list before bed, keep the last hour dim and quiet, leave your phone outside the bedroom and get up at the same time every day. If you are still awake and frustrated, get out of bed until you feel sleepy.
Does writing a to-do list really help you sleep? In a sleep laboratory study, young adults who wrote a specific to-do list for five minutes before bed fell asleep faster than those who wrote about tasks they had already completed.
How much melatonin do I need to fall asleep faster? Under EU rules, melatonin contributes to the reduction of time taken to fall asleep, and the beneficial effect is obtained by consuming 1 mg of melatonin close to bedtime. One Z-z-Zen strip contains 1 mg.
When should I take Z-z-Zen? 20 to 30 minutes before sleep. Place the strip on your tongue and it dissolves in 7 to 30 seconds, with no water needed.
When is trouble falling asleep a reason to see a doctor? If better habits have not helped, if it has lasted for months, or if it makes daily life hard to cope with. A doctor can check for other causes and refer you to CBT-I.
Sources
- Riemann D, Spiegelhalder K, Feige B, Voderholzer U, Berger M, Perlis M, Nissen C. The hyperarousal model of insomnia: a review of the concept and its evidence. Sleep Medicine Reviews. 2010;14(1):19-31. doi.org/10.1016/j.smrv.2009.04.002
- Harvey AG, Gregory AM, Bird C. The role of cognitive processes in sleep disturbance: a comparison of Japanese and English university students. Behavioural and Cognitive Psychotherapy. 2002;30(3):259-270. doi.org/10.1017/S1352465802003028
- Chang AM, Aeschbach D, Duffy JF, Czeisler CA. Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proceedings of the National Academy of Sciences. 2015;112(4):1232-1237. doi.org/10.1073/pnas.1418490112
- Drake C, Roehrs T, Shambroom J, Roth T. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of Clinical Sleep Medicine. 2013;9(11):1195-1200. doi.org/10.5664/jcsm.3170
- Ebrahim I, et al. Alcohol and sleep I: effects on normal sleep. Alcoholism: Clinical and Experimental Research. 2013;37(4). doi.org/10.1111/acer.12006
- NHS. Insomnia. nhs.uk/conditions/insomnia
- Scullin MK, Krueger ML, Ballard HK, Pruett N, Bliwise DL. The effects of bedtime writing on difficulty falling asleep: a polysomnographic study comparing to-do lists and completed activity lists. Journal of Experimental Psychology: General. 2018;147(1):139-146. doi.org/10.1037/xge0000374
- Carney CE, Waters WF. Effects of a structured problem-solving procedure on pre-sleep cognitive arousal in college students with insomnia. Behavioral Sleep Medicine. 2006;4(1):13-28.
- Edinger JD, Arnedt JT, Bertisch SM, et al. Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. Journal of Clinical Sleep Medicine. 2021;17(2):255-262. doi.org/10.5664/jcsm.8986
- Commission Regulation (EU) No 432/2012 establishing a list of permitted health claims made on foods, other than those referring to the reduction of disease risk and to children's development and health. Official Journal of the European Union. eur-lex.europa.eu/eli/reg/2012/432
