The short answer: The Huberman sleep stack is magnesium, apigenin and L-theanine. The evidence is uneven. L-theanine has the most support, with small to moderate effects. Magnesium helps a little, mostly if you are low. Apigenin has very little human sleep data.
Why is everyone talking about the Huberman sleep stack?
On 16 October 2026, Marie Claire UK ran a first-person piece by Anna Bartter [1]. Perimenopause had wrecked her sleep, so she tried the Huberman "sleep stack" for seven days [1].
She still woke at around 4 am. But she said she felt less alert when she stirred, and got back to sleep more easily [1]. She also noted that the stack has not been tested in perimenopausal women [1].
That is an honest review. Here is what the science says about each part, so you know what you are buying before you order three bottles.
What is in the Huberman sleep stack?
Neuroscientist and podcaster Andrew Huberman lists it in his sleep toolkit [2]:
- Magnesium: 145 mg magnesium threonate, or 200 mg magnesium bisglycinate [2].
- Apigenin: 50 mg [2]. This is a plant compound found in chamomile.
- L-theanine: 100 to 400 mg [2]. This is an amino acid found in tea leaves.
He also adds a warning. He says not to take theanine if you have overly intense dreams, sleepwalk or have night terrors [2].
One thing to know upfront is that we could not find a trial that tested this exact three-part stack. So the evidence below is for each ingredient on its own.
Does magnesium help you sleep?
A little, for some people. A 2026 review in the Journal of Dietary Supplements looked at 12 trials of magnesium alone [3]. The results were inconsistent, and the certainty of the evidence was low to very low [3].
The review said magnesium should not be a routine fix for insomnia [3]. It may give modest benefits to some adults [3].
One of the better trials, from 2025, gave 155 adults with poor sleep 250 mg of magnesium as bisglycinate, or a placebo [4]. After four weeks, insomnia scores fell 3.9 points with magnesium and 2.3 with placebo [4]. That is on a 28-point scale, so the extra benefit was small [4].
People who ate less magnesium at the start seemed to improve more [4]. So magnesium may help most if your diet is short of it. Our post on what the 2026 review found goes deeper.
Is magnesium threonate better for sleep?
Threonate is sold as the form that reaches your brain. WIRED looked at this on 18 October 2026 [5].
The brain claim mostly comes from a study in rats [5]. In humans, there are a few small trials, but several were short or tested mixtures [5]. Many were funded by supplement makers or run by their staff [5]. And none measured magnesium inside the brain [5].
So there is no good evidence that threonate beats other forms for sleep. Huberman himself lists bisglycinate as an alternative [2].
Does L-theanine help you sleep?
This is the strongest part of the stack. A 2025 review in Sleep Medicine Reviews pooled the trials [6]. It included 19 papers with 897 people, and 18 went into the main analysis [6].
L-theanine improved how quickly people felt they fell asleep [6]. It also improved how people felt during the day, and their overall sleep quality scores [6].
The size of the effect matters, and for falling asleep it was small. For overall sleep quality, it was closer to moderate [6]. Think of it as a calmer wind-down, not a knockout pill.
There is a catch, because the authors said few studies used "pure" L-theanine [6]. Many mixed it with other ingredients, which makes the effect of theanine alone harder to judge. They also said the right dose and duration are still unclear [6].
For more on theanine, read our post on L-theanine and caffeine.
Does apigenin help you sleep?
We honestly do not know yet. Apigenin is a flavonoid, a type of plant compound, found in chamomile, parsley and celery. Most human sleep research uses chamomile extract, not pure apigenin.
The results are not impressive so far. A 2011 pilot trial gave 34 adults with long-term insomnia 270 mg of chamomile extract twice a day, or a placebo, for 28 days [7]. There were no significant differences in sleep diaries between the groups [7]. Chamomile showed only a small, non-significant edge on daytime functioning [7].
On tolerability, chamomile extract has been studied for longer. In a 2016 anxiety trial, people took 1,500 mg a day, and some continued for 26 more weeks [8]. Side effect rates were similarly low with chamomile and placebo [8].
That says something about chamomile extract. It does not tell us much about 50 mg of pure apigenin every night for years. That is still an open question.
What this means if you...
...are in perimenopause and waking at 4 am
The stack has not been tested in women like you, and hormone changes, night sweats and stress all play a part. Talk to your gynaecologist, because there may be better options to discuss.
...want to try just one thing first
L-theanine has the most evidence of the three, and if your diet is low in dals, nuts and greens, magnesium may also be worth a look. Try one change at a time, so you know what is working.
...take medicines or have a health condition
Supplements can interact with some medicines. Check with your doctor before adding any of these, especially if you take sleep or anxiety medicines.
Where AIM stands
Our sleep blend UNWIND uses the same ingredient family. Three tablets give 393 mg of elemental magnesium from bisglycinate and citrate, with zero oxide. They also give 600 mg L-theanine, 75 mg apigenin and 1.9 mg vitamin B6 as P-5-P. We want to be clear about the numbers. The theanine is above Huberman's 100 to 400 mg range. The apigenin is above his 50 mg, and higher than you would get from food. The magnesium is above the US upper level of 350 mg a day from supplements. We do not claim our blend works better than the evidence above. Follow the label, and ask your doctor if you are unsure.
Frequently asked questions
What is in the Huberman sleep stack?
Andrew Huberman's sleep toolkit lists three supplements. These are 145 mg magnesium threonate or 200 mg magnesium bisglycinate, 50 mg apigenin, and 100 to 400 mg L-theanine. He says to skip theanine if you get overly intense dreams, sleepwalk or have night terrors. We could not find a trial that tested this exact combination.
Does the Huberman sleep stack actually work?
Parts of it have some evidence. A 2025 review found L-theanine improved subjective sleep, with small to moderate effects. Magnesium trials are inconsistent, with a small benefit in one good 2025 trial. Apigenin has very little human sleep data. The combination itself has not been tested as a stack.
Is magnesium threonate better than magnesium glycinate for sleep?
There is no good evidence that it is. The idea that threonate reaches the brain better comes mostly from a rat study. Human trials have been small and often short, several were industry-funded, and none measured brain magnesium. Huberman himself lists magnesium bisglycinate as an alternative to threonate.
Is apigenin safe to take every night?
We do not know enough to say. Apigenin is a flavonoid found in chamomile, parsley and celery. Chamomile extract has been studied for up to 26 weeks, with low side effect rates similar to placebo. But long-term data on pure apigenin supplements is limited. Ask your doctor, especially if pregnant or on medicines.
Can L-theanine give you vivid dreams?
Some people say it does. Andrew Huberman says some people find theanine gives them disruptive dreams, and advises avoiding it if you have overly intense dreams, sleepwalk or have night terrors. If your dreams become disruptive after starting theanine, stop and see whether they settle. Tell your doctor if sleep problems carry on for more than a few weeks.
Sources
- Bartter A. Perimenopause ruined my sleep, so I tried the Huberman 'sleep stack' for 7 days. Marie Claire UK, 16 October 2026. marieclaire.co.uk
- Huberman Lab. Toolkit for sleep. Accessed 21 October 2026. hubermanlab.com
- Lopresti AL, Smith SJ, Drummond PD. Magnesium supplementation for sleep in adults: a systematic review of randomized controlled trials. Journal of Dietary Supplements, 2026, 23(5):553-581. doi:10.1080/19390211.2026.2719670
- Schuster J, Cycelskij I, Lopresti A, Hahn A. Magnesium bisglycinate supplementation in healthy adults reporting poor sleep: a randomized, placebo-controlled trial. Nature and Science of Sleep, 2025. doi:10.2147/NSS.S524348
- Obr A. Magnesium may not reach your brain, despite supplement label promises. WIRED, 18 October 2026. wired.com
- Bulman A, D'Cunha NM, Marx W, Turner M, McKune A, Naumovski N. The effects of L-theanine consumption on sleep outcomes: a systematic review and meta-analysis. Sleep Medicine Reviews, 2025, 81:102076. doi:10.1016/j.smrv.2025.102076
- Zick SM, Wright BD, Sen A, Arnedt JT. Preliminary examination of the efficacy and safety of a standardized chamomile extract for chronic primary insomnia: a randomized placebo-controlled pilot study. BMC Complementary and Alternative Medicine, 2011, 11:78. doi:10.1186/1472-6882-11-78
- Mao JJ, Xie SX, Keefe JR, Soeller I, Li QS, Amsterdam JD. Long-term chamomile (Matricaria chamomilla L.) treatment for generalized anxiety disorder: a randomized clinical trial. Phytomedicine, 2016. doi:10.1016/j.phymed.2016.10.012
This article is for education only and is not medical advice. Supplements are not a substitute for a varied diet or for treatment from a qualified doctor. If you are pregnant, breastfeeding, on medication, or have a medical condition, talk to your doctor before starting any supplement. Individual results vary.
Photo: Karola G via Pexels.