NEW! Get deep, restful sleep at night and wake up with heaps of energy — 100% naturally, without addictive sleeping tablets 

(Even If Nothing Worked Before)

New Deep Sleep Mode contains scientifically proven natural ingredients shown to melt away anxiety, banish bloating, balance hormones, boost desire, heal leaky gut and make weight loss easy — all while you sleep

Deep Sleep Mode™
Deep Sleep Mode™
Deep Sleep Mode™
Deep Sleep Mode™
Deep Sleep Mode™
Deep Sleep Mode™
Deep Sleep Mode™ Deep Sleep Mode™ Deep Sleep Mode™ Deep Sleep Mode™ Deep Sleep Mode™ Deep Sleep Mode™

Deep Sleep Mode™

Rated 4.7 out of 5
Based on 1925 reviews
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Promotes 7 - 9 Hours of Unbroken Sleep

The unique combination of 11 natural ingredients helps you get 7 - 9 hours of unbroken sleep every night. Plus, Deep Sleep Mode supports high energy levels in the morning and during the day. It also lifts your mood and makes you think clearer the natural way.

Helps You Fall Asleep 2 Times Faster

Deep Sleep Mode has ingredients shown in scientific studies to help you fall asleep two times faster. So if it takes you 1 hour now to fall asleep now — this formula can cut this down to just 30 minutes or even less!

Boosts Weight Loss and Increases Desire

Studies show that without a restful sleep, it’s 52% harder to lose weight. Plus, when we’re constantly tired, stress hormones are off the charts — this makes our desire drop like a rock. That's why Deep Sleep Mode supports long, healthy sleep that balances our body, unlocks new weight loss and boosts our desire.

Thousands of Women Are Now Sleeping for 7-9 Hours Straight Without Restrictive Diets, Expensive Gadgets, or Dangerous Sleep Pills

lan W. BUYER

It definitely helps my sleep

As a permanent week on week off night shift worker, there's no end of challenges to getting a good sleep. So far, I am pleased with the results. This product doesn't make me sleep like a brick. It doesn't claim to do that. But yes, it does help to stabilise my sleep patterns, and even makes that initial difficulty just plain getting to sleep...possible for me

Priscilla D. BUYER

Fabulous product

I have so much trouble sleeping and have found that this new Deep Sleep Mode works really well. Well done Happy Mammoth!

Judith S. BUYER

First time trying Happy Mammoth

I was a little sceptic, but after three days, I am sold, it has helped me sleep better and I am waking without stomach issues.

Janette N. BUYER

At last!

Very happy to find something which helps me stay asleep. Often I can get to sleep only to wake and stay awake 1-2 hrs later. After a few days of taking Sleeping mode I'm sleeping an uninterrupted 7 hours

Mandy G. BUYER

Sleep ❤️

I am on my 3rd tub, definitely better sleep. I fall asleep faster and return to sleep faster if woken during the night. No drowsiness in the morning. Easy to mix. Once you feel the benefits you'll never forget to take it. So worth it!

Linda H. BUYER

It really does work!

I only use it when I can't go to sleep and am always amazed how well it works! I drift into a deep restful sleep. Only one or two capsules needed.

Lee-Anne C. BUYER

Amazing! And it works!

I have tried so many different products and ideas over the years and nothing has worked until now. I have been suffering with insomnia for years, barely getting two hours sleep a night. Now l’m getting a solid 7-8 hours every night. It works really well except I think my body is still adjusting to getting this much rest.

Carol S. BUYER

Best ever!

Since taking the Deep sleep mode my insomnia has disappeared. I am waking up feeling so refreshed. Highly recommend!

Ronda S. BUYER

Sleep Like a Baby

From the first night of using this product, I have slept very soundly and only woken once, to roll over. Would highly recommend this product to anyone

Carolyn C. BUYER

Deep Sleep Mode tablet

Excellent, not really helping to get me to sleep any faster but I am DEFINITELY sleeping a more deep, restful and longer sleep when I get to sleep. I feel better when I wake and since its been many years (due to a child that didn't sleep through the night). Thank you

Gail K. BUYER

Working a Treat

I bought this for my 28 year old son who's suffered from some kind of insomnia since he was a child. He and I are both delighted that this is helping him stay asleep throughout the night. He still has a little trouble going to sleep, but we are hopeful that over time (it's only been a little over a week that he's been using it), this too will resolve. Many thanks for a great product and timely service.

Madi S. BUYER

Deep Sleep Mode

Very effective and being in tablet form makes it more convenient, although the tablets are quite large and you need to take quite a few of them at once

Tracey P. BUYER

Sleepy

I do love it. I just wish I didn't have to swallow so many. It's a lot along with my other supplements take . But it definitely helps me get to sleep.

Peta C. BUYER

Sleeping Easy

I had previously been a heavy sleeper, so was really struggling with a recent change in sleep pattern where I was awake several hours every night. After a couple of nights of taking Deep Sleep capsules, noticed a much less interrupted sleep.

Lee T. BUYER

Working well so far

My sleep has improved. I was waking at around 2 in the morning and not getting back to sleep for at least a couple of hours. I am now going back to sleep in less time. Let’Ms see what else improves as time goes on.

The Only Natural Formula That Eliminates All 4 Poor Sleep Triggers To Give You A Positive New Lease On Life

There are four key mechanisms in your body responsible for turning your nights into nightmares. We call them Poor Sleep Triggers. Deep Sleep Mode is the only natural formula that covers all the bases and eliminates all Poor Sleep Triggers.

These are:

Poor Sleep Trigger #1:

Imbalanced Sleep and Stress Hormones

High levels of stress hormones in the body keep us alert at night and make it impossible to sleep well.


On the other hand, when we’re low on sleep hormones, our brain loses its ability to switch off. This makes it stay awake at night.

What the science says: One study found1 even one day of sleep deprivation spikes the stress hormone levels in our body 4.4 times. Another study revealed that low sleep hormone levels can shorten the length of deep sleep 3.7 times.2

Poor Sleep Trigger #2:

Anxiety And Stress

Stress impacts our brain chemistry and hormonal balance. This triggers anxiety and floods your brain with thoughts that keep you awake when you try to fall asleep. It even makes us feel like a hunted animal at times.


What the science says: Studies show that even small everyday stress makes it harder for you to fall asleep and deprives you of vital deep sleep.3

Poor Sleep Trigger #3:

Poor Gut Health 

An unhealthy gut creates less sleep hormones. It also absorbs less of the nutrients our brain needs to sleep well. Plus, gut issues like bloating, pain inflammation or gas make us wake up at night.

What the science says:  Studies show that people with a healthy gut sleep better, are more focused and think clearer.4

Poor Sleep Trigger #4:

Inflammation

Inflammation attacks joints and muscles, making them sore and achy. This then makes us toss and turn for hours to find a comfortable position. Also, a sudden stabbing pain wakes us up and breaks our sleep cycle.

What the science says: 72 studies link inflammation with shallow, broken, and short sleep.5

Here's how Deep Sleep Mode Makes You Fall Into a Restful Sleep in 9 Days Or Less

Poor Sleep Trigger #1:

Deep Sleep Mode Balances Your Stress and Sleep Hormones Thanks to These 3 Sleep-Boosting Nutrients . . .

Magnolia Bark Extract

Makes it easy to fall and stay asleep (while balancing hormones).

Magnolia has over 200 compounds that balance your stress hormones and soothe your nerves. It helps you fall asleep faster. It can even stop menopausal symptoms like irritability, low libido, and anxiety.

  • A study on 634 menopausal women found that the ones taking Magnolia slept way better than those who didn't take it. Plus, they were less irritable, less anxious, and their libido was up!6

  • Two other studies have shown that Magnolia balances your stress hormones and makes it easier to fall asleep.7,8

  • As a bonus, another study found that9 Magnolia combined with magnesium reduces hot flashes, night sweats and melts away depression!

Natural 5-HTP (from African plant Griffonia Simplicifolia)

Boosts serotonin for 10 times better sleep, perfect mood and easy weight loss.

5-HTP (or 5-Hydroxytryptophan) - is a natural amino acid that turns into serotonin in our bodies. It's found in African plants called Griffonia Simplicifolia. It's very powerful in helping us transform our sleep, have a great mood and it supports our weight loss efforts:

  • One study found that 5-HTP improved people's deep sleep by a massive 10 times compared to baseline! 10

  • Another study found that 5-HTP helped women lose weight and improve their BMI.11 This means it helps to eliminate stubborn fat from the tummy, hips and thighs and restore healthy weight. 

  • And two other studies support these findings by showing that 5-HTP makes us feel more satiated and decreases our cravings.12

  • Multiple studies show 5-HTP melts away anxiety and gives us great mood: in one study it provided a huge relief for people suffering from panic disorders. In another study it reduced anxiety. And in yet another study, scientists found it helps let go of depression.13

Reishi Mushroom Extract

Helps manage stress, boosts energy and extends the length of sleep

For centuries, Reishi mushrooms have been the pillar of eastern medicine. They're a well-known immunity booster. And they have many proven sleep and energy benefits, too:

  • They help manage stress and quickly restore the feeling of  calmness.14

  • Two studies found that Reishi speeds up falling asleep and extends the length of deep sleep.15,16

  • A double-blind placebo study found that Reishi boosts energy, even in patients with chronic tiredness.17

Poor Sleep Trigger #2:

Deep Sleep Mode Eliminates Stress and Anxiety Thanks to 3 Powerful Herbs . . .

Potent L-Theanine Extract

A powerful amino acid that calms down a racing mind and boosts mental performance.

L-Theanine is an amino acid found in green tea. It boosts men's sleep by reducing stress, anxiety and calming down a racing mind. As a bonus — it improves our focus and attention, and helps maintain optimal blood pressure.

  • 4 studies found that people taking L-Theanine were calmer and more in control in stressful conditions compared to other people.18

  • Another study found that L-Theanine together with coffee boosts our attention and gives us laser-sharp focus.19

  • One study found that L-Theanine boosts sleep quality even in people with severe hyperactivity disorders.20

  • It works lightning fast — in one study, patients reported L-Theanine gave them a soothing sense of relaxation after just 30 minutes of taking it!21

Valerian and Hops Flower Extracts

Make you get to sleep 2 times faster.

People have been using these two natural "anxiety removers" for thousands of years to calm down and sleep better. Recently, scientists found that when you take them together — they work even better!

  • One study found that people who take Valerian with Hops sleep way better than those taking a placebo or Valerian alone.22

  • Another study found that Valerian with Hops make you fall asleep 2 times faster. So if it takes you an hour to fall asleep now — Valerian and Hops can cut this down to just 30 minutes!23

  • Yet another study found that Valerian and Hops are so powerful that just a single dose gives you much longer, undisturbed sleep. That's why Deep Sleep Mode works instantly24!

  • Plus, as many as 89% of people taking Valerian and Hops report that they sleep better than before!25

Natural Gamma-Aminobutyric Acid (GABA)

Reduces stress in just 1 hour and speeds up falling asleep

GABA is a natural amino acid that works as a neurotransmitter in our bodies. It works as a "brake for our brain" because it soothes our nerves, melts away stress and stops thoughts from racing hectically through our minds.

  • Two studies found that GABA helps us relax even in stressful situations. And it works fast — people report they felt calmer in about 1 hour after taking it26

  • Another study found that people taking GABA fall asleep 57% FASTER.27

  • Two studies found that GABA significantly reduces stress in people taking it28

  • Plus, yet another study found that people taking GABA had more energy when working on complicated tasks29

Poor Sleep Trigger #3 and #4:

 Deep Sleep Mode Heals Your Gut and Melts Away Inflammation Thanks to . . .

Natural Glycine

(From Hydrolyzed Collagen Peptides)

Makes you burst with energy in the morning.

Collagen strengthens and seals your gut. It can stop bloating, gas, heartburn and other digestive issues. With a healthy gut, you quickly absorb all the nutrients vital for a good sleep. And you produce more serotonin — the key hormone for your sleep. But that's not the end of the sleep benefits of Collagen.

It also melts away inflammation — one of the main causes of shallow sleep. It does it by rebuilding the protective layer inside your gut and around your joints. That's how Collagen gives you a long, unbroken sleep!


Plus . . .

  • Collagen is rich in glycine — an amino acid shown in studies to boost sleep and raise your energy during the day. 30

  • A double-blind placebo study found that people taking glycine felt refreshed in the morning and had much more energy and clearer thinking than those taking a placebo.31

  • Another study found that glycine helped people fall asleep faster, sleep longer, and spend more time in a soothing deep sleep.32

  • Collagen has other benefits, too. It can improve your skin, hair and nails. It can also help with joint pain and reduce sugar cravings.

So far, I told you about 8 clinically proven sleep nutrients. If Deep Sleep Mode had only these nutrients, it would be one of the best formulas around. But to make it THE best formula in the category, we also added . . .

2 More Sleep-Boosting Nutrients to Give You Unbroken Sleep

Natural Melatonin:

Melatonin is the key hormone responsible for your sleep. That's why Deep Sleep Mode has natural Melatonin that regulates your sleep cycle to give you enough sleep and make you well-rested.

19 studies found33 that Melatonin helps you fall asleep faster, sleep longer and feel refreshed in the morning. Plus, another study34 found it balances your cortisol levels and makes you calmer.

Potent Vitamin B6: 

Your body needs Vitamin B6 to produce serotonin35 and melatonin — the two important hormones for your sleep. Scientists found36 that women with Vitamin B6 deficiency are at a high risk of suffering from insomnia and depression.

That's why Deep Sleep Mode gives you 14 mg of natural, potent Vitamin B6 — the exact amount shown in studies to deliver the biggest benefit.

31,643 Women Use Deep Sleep Mode to Finally Feel Rested, Calm And Energised

Deep Sleep Mode Compared To Mass Market One Dimensional Products

​​NEW Deep

Sleep Mode

  • 10 natural nutrients that work together to naturally activate your unique Deep Sleep Mode for a perfect 7 - 9 hour of sleep
  • Adapts to the unique needs of your body.
  • Naturally transitions your body through all 4 stages of deep rejuvenating sleep
  • Eliminates the 4 Poor Sleep Triggers at once
  • Ingredients backed by 12,622 scientific studies
  • The exact doses taken from real scientific findings
     
  • Natural ingredients designed to help you navigate peacefully through deep sleep
  • Does not contain fillers or artificial ingredients
  • Gut Friendly Certified - does not contain known gut irritates
  • Over one year of development with insane quality standards
  • Free from GMOs, soy, corn, dairy or gluten
  • Ingredients tested for heavy metals, pesticides and viruses
  • Clears up those past years of craziness caused by sleep problems
  • Goes through a 9-step process that guarantees the highest quality possible

Outdated Mass Market one dimensional product

  • The ingredients do not support each other. Different products cannibalise each other or trigger side-effects
     
  • Does not adapt to the unique needs of your body
  • Habit-forming with potential for addiction and abuse
  • Does not address the 4 Poor Sleep Triggers
  • Ingredients are likely under-dosed and not backed by science
  • Treats 1 or 2 symptoms. Doesn’t get to the root cause of your unique sleep problem
  • May trigger night terrors or bad dreams about people you know
  • May contain toxins your body cannot handle
  • May contain ingredients and additives known to hurt the gut
  • Likely slapped together to make a quick dollar or it’s a generic stock formula
  • May contain GMO’s, soy, corn, dairy or gluten
  • Ingredients may not be tested for heavy metals, residues, pesticides and viruses
  • Does not clear up past years of craziness caused by sleep problems
  • Questionable quality control
     

Outdated Mass Market one dimensional product

  • The ingredients do not support each other. Different products cannibalise each other or trigger side-effects.
     
  • Does not adapt to the unique needs of our body
  • Habit forming with potential for addiction and abuse
  • Does not address the 4 Poor Sleep Triggers
  • Ingredients are likely under-dosed and not backed by science
  • Treats 1 or 2 symptoms. Doesn’t get to the root cause of our unique sleep problem
  • May trigger night terrors or bad dreams about people you know
  • May contain toxins the body cannot handle
  • May contain ingredients and additives known to hurt the gut
  • Likely slapped together to make a quick dollar or it’s a generic stock formula
  • May contain GMO’s, soy, corn, dairy or gluten
  • Ingredients may not be tested for heavy metals, residues, pesticides and bacteria
  • Does not clear up past years of craziness caused by sleep problems
  • Questionable quality control process...
     

​​NEW Ultra Potent 

Deep Sleep Mode

  • 11 natural nutrients that work together to naturally activate your unique Deep Sleep Mode for a perfect 7 - 9 hour of sleep
  • Adapts to the unique needs of our body.
  • Naturally transitions the body through all 4 stages of a deeply rejuvenating sleep
  • Eliminates the 4 Poor Sleep Triggers all at once
  • Ingredients backed by 13,239 scientific studies
  • The exact doses taken from real scientific findings
     
  • Natural ingredients designed to help us navigate peacefully through REM sleep
  • Does not contain fillers or artificial ingredients
  • Certified & Tested Gluten & Dairy Free - does not contain known gut irritates
  • Over one year of development with insane quality standards
  • Free from GMOs, soy, corn, dairy or gluten
  • Ingredients tested for heavy metals, pesticides and bacteria
  • Clears up those past years of craziness caused by sleep problems
  • Goes through a 9-step process that guarantees the highest quality possible

9 Ways We Guarantee The Highest Quality of Deep Sleep Mode

Deep Sleep Mode meets the world's highest quality standards. 

Here are 9 ways we ensure every batch is pure, clean and effective.

1. Formulated by natural health experts with 20 years of experience

NEW Deep Sleep Mode has been formulated by a world-famous health practitioner from Australia, with a team of nutrition experts and researchers with degrees in nutrition and chemistry.

2. Made in Amsterdam, Netherlands according to world-leading European Union standards

Deep Sleep Mode is produced in the Netherlands in small batches to maintain ultra-high quality. It matches the strict EU manufacturing and safety standards.

3. We Take Ingredients From Trusted Suppliers We Know and Trust

We source our ingredients on our own, and we use 100% organic and fair sources. We work with just a few suppliers and visit them regularly to ensure we always get top-quality ingredients.

4. Three-Stage Quality Control

Every ingredient in our formula goes through three stages of quality control to ensure 100% purity. This way, we KNOW that every ingredient is clean and delivers you promised health benefits.

5. Ingredients and Dosages Based on Real Scientific Data

All the ingredients in Deep Sleep Mode have been shown to improve sleep and deliver promised benefits. The ingredients are in the exact doses shown in studies to deliver the best results.

6. 100% Natural With No Fillers And Additives

Deep Sleep Mode contains only natural ingredients. It's free from fillers, preservatives, artificial flavours, stearates or other toxic junk.

7. Gut-Friendly Certified

Know with absolute confidence that Deep Sleep Mode is free from the established 69 known gut irritants.

8. Heavy Metal Tested

We use world-class laboratory detectors to ensure that Deep Sleep Mode is 100% free from heavy metals.

9. Free From Gluten, Dairy, Sugar and GMO's

Deep Sleep Mode is free from gluten, lactose, dairy, corn, soy and GMO ingredients.

Either it Works — Or it's FREE!

Test Deep Sleep Mode 100% Risk-Free Thanks to Our 60-day Money Back Guarantee

We want you to love everything about Deep Sleep Mode. We want it to smash your sleep problems in 9 days or less to bring back all the energy, vitality, happiness and desire you want and deserve! We want it to help you bring your "old self" back and put you in control again! And we did everything to guarantee it delivers ALL the promised benefits.

However, we believe that everyone has the right to test it 100% risk-free. So here's our 2-step guarantee:


Get Deep Sleep Mode NOW and use it every day, following our recommendations. 

We guarantee you'll see the first amazing results in 9 days — or it's FREE! 


Then, continue taking it to see how it changes your life. If for any reason, you're unhappy with it, you have 60-days (2 months) to let us know and get your money back. No questions asked!


To claim the refund, simply email our friendly customer support. Their contact details are on every bottle of Deep Sleep Mode.


But based on hundreds of 5-star reviews from thrilled customers, we're convinced you'll be blown away with Deep Sleep Mode. So don't hesitate and test it now risk-free:

Frequently Asked Questions

How does Deep Sleep Mode work?

And what makes it different from other sleep supplements?

After going through 12,622 studies, we discovered four key mechanisms in your body that destroy your sleep. We call them Poor Sleep Triggers. We also found that any single one of these triggers switches on the other ones. When that happens, your sleep problems grow more severe — and are harder to fix.


If you tried different solutions yet nothing worked — it's a tell-tale sign you're suffering from multiple Poor Sleep Triggers. That's because most sleep remedies tackle just one or two triggers at best. The rest of them stay untouched.


That's why we formulated Deep Sleep Mode in a way, so it eliminates all the four Poor Sleep Triggers. It's the only natural supplement that does it without side effects and feeling groggy in the morning.

What’s in the Deep Sleep Mode formula?

Deep Sleep Mode has the following ingredients:

L-Theanine, Magnesium, GABA, 5-Hydroxytyptophan 99% pure, Organic Red Reisi Mushroom Extract 10:1, Hops Flower Extract 10:1, Passionflower Extract 10:1, Valerian Root Extract 15:1, Magnolia Extract 30:1,  Zinc Picolinate, Melatonin, Vitamin B6., Nu-Mag, Nu-flow, Cellulose.


How often should I take Deep Sleep Mode?

What do I need to do to have the best experience?

For the best experience, take 3 capsules every night before sleep.


And remember — the 100% natural formula in Deep Sleep Mode is not habit-forming. So it’s absolutely safe to take every night.


Now, most of our customers say they drift off into deep, restful sleep after their very first night. And that they wake up the next morning feeling fresh, glowy, and fabulous.


But other women report that it took them about a week before they started to see consistent improvements. So don’t worry if it takes a few days for the formula in Deep Sleep Mode to fully kick in.


Also, for boundless energy, radiant skin, and a slimmer waist — we recommend using deep sleep mode for at least 90 days…


Because many of our customers rave about how much their wrinkles and heavy eye bags fade after three months of deep beauty sleep…


And about how trim and sexy they look when they finally get the sleep they need to supercharge their fat-burning metabolism…


Most importantly, our customers love how much better their relationships are with their partners, kids, friends, and family when they’re not constantly cranky and exhausted from lying awake all night.


So that’s why we offer a bigger discount on the two- or six-bottle bundles of Deep Sleep Mode.

How long does each bottle last?

Each bottle contains a 24-day, 72-day, and 144-day supply of Deep Sleep Mode. So the three-bottle package gives you a 90-day supply. And the six-bottle package gives you a 180-day supply.

What happens if I don’t like Deep Sleep Mode?

We want you to love everything about your experience with Deep Sleep Mode. So go ahead and try it for a full 60 days. And if you aren’t totally satisfied, just email our friendly customer support team. Their email address is included on every bottle of Deep Sleep Mode. 

And with one quick message, we’ll issue a prompt and courteous refund of the full purchase price. Even on empty bottles. No questions asked.

No, there are no known side effects. Deep Sleep Mode is safe, non-habit-forming.
We make Deep Sleep Mode in the Netherlands, according to the European Union quality standards.

Plus, Deep Sleep Mode has…

NO artificial colours, flavours, sweeteners or preservatives.

NO fillers, stearates, coatings, or dyes.

NO GMOs, gluten, soy, or dairy.

And NO heavy metals.

Which means it’s completely safe to take every night before bed.

Scientific References

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  3. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4266573/
  4. https://www.sciencedirect.com/science/article/abs/pii/S1389945717303179
  5. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4666828/
  6. https://pubmed.ncbi.nlm.nih.gov/21311416/
  7. https://pubmed.ncbi.nlm.nih.gov/21311416/
  8. https://www.ncbi.nlm.nih.gov/pubmed/16957676
  9. https://pubmed.ncbi.nlm.nih.gov/16957676/
  10. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7796270/#B135-ijms-22-00181
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  12. https://pubmed.ncbi.nlm.nih.gov/2468734/
  13. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7796270/#B135-ijms-22-00181
  14. https://ommushrooms.com/blogs/blog/does-reishi-help-you-sleep-m2
  15. https://pubmed.ncbi.nlm.nih.gov/22207209/
  16. https://pubmed.ncbi.nlm.nih.gov/17383716/
  17. https://pubmed.ncbi.nlm.nih.gov/15857210-a-randomized-double-blind-and-placebo-controlled-study-of-a-ganoderma-lucidum-polysaccharide-extract-in-neurasthenia/
  18. https://www.sciencedirect.com/science/article/pii/S2352385915003138?via%3Dihub
  19. https://pubmed.ncbi.nlm.nih.gov/21040626/
  20. https://www.ncbi.nlm.nih.gov/pubmed/22214254
  21. https://www.liebertpub.com/doi/abs/10.1089/10762800151125092
  22. https://pubmed.ncbi.nlm.nih.gov/17486686/
  23. https://pubmed.ncbi.nlm.nih.gov/16335333/
  24. https://pubmed.ncbi.nlm.nih.gov/18559301/
  25. https://pubmed.ncbi.nlm.nih.gov/2678162/
  26. https://www.healthline.com/health/gamma-aminobutyric-acid#effectiveness
  27. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6031986/
  28. https://link.springer.com/article/10.1007/s00726-011-1206-6
  29. https://www.tandfonline.com/doi/abs/10.1080/09637480802558508
  30. https://www.jstage.jst.go.jp/article/jnsv/57/1/57_1_9/_article
  31. https://www.nature.com/articles/npp2014326
  32. https://link.springer.com/article/10.1111/j.1479-8425.2006.00193.x
  33. https://www.psychologytoday.com/us/blog/sleep-newzzz/201902/4-sleep-benefits-glycine
  34. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3656905/
  35. https://pubmed.ncbi.nlm.nih.gov/25908646/
  36. https://lpi.oregonstate.edu/mic/vitamins/vitamin-B6
  37. https://synapse.koreamed.org/articles/1051143