Nutrex HIBERN8 Powerful Sleep Formula ZMA Melatonin GABA L-Tryptophan 90 caps


Sleep Aids


    HIBERN8 is a powerful sleep formula that helps to easily fall and stay asleep. It promotes deep and restful sleep. By doing so it supports nighttime  recovery of mind and muscles. Waking up refreshed in the morning increases mood, productivity and is essential for achieving optimum physical  strength...
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HIBERN8 is a powerful sleep formula that helps to easily fall and stay asleep. It promotes deep and restful sleep. By doing so it supports nighttime 

recovery of mind and muscles. Waking up refreshed in the morning increases mood, productivity and is essential for achieving optimum physical 

strength and appearance.

With the wide-spread use of energy drinks, fat burners and pre-workout supplements, stress at work and at home, deep quality sleep can be very

 hard to come by. HIBERN8 is clinically dosed and starts working the very first time you take it. Just one serving of HIBERN8 is all that you will need

 to achieve deep uninterrupted sleep. Try HIBERN8 tonight and wake up refreshed, recovered and ready for more!                                   


The relationship between Magnesium and sleep has been studied fairly extensively, and there appears to be a two-way correlation, with Magnesium helping to correct sleep-related issues in some studies, and inadequate sleep reducing Magnesium levels as well. 

A 2002 study, published in “Pharmacopsychiatry”, found that Magnesium was able to increase slow-wave (deep) sleep and reduce Cortisol levels, thus normalizing age-related changes in sleeping patterns in elderly subjects. These results were replicated in a 2002 study from “Public Health Nutrition” in older (59 give or take 8 year old) subjects with inadequate dietary Magnesium intake. 

Overall, while Magnesium may not be particularly effective in individuals with high (more than adequate) dietary intake, it can certainly improve sleep quality in those whose diets are lacking. Hibern8 contains about 50% of the RDI for Magnesium, a sufficient dose for normalizing any deficiency-related sleep issues.


GABA is the primary inhibitory (downer) neurotransmitter in the brain, as opposed to Glutamate which is the primary excitatory (upper) neurotransmitter.

Hibern8 contains 1000mg of GABA, a higher dose than we normally expect to see in sleep-aid supplements.


Tryptophan is an amino acid that, in addition to helping build proteins, acts as a precursor to 5-HTP (a direct precursor to Serotonin). Tryptophans potential as a sleep-aid has been known for quite some time, with most of the studies being performed 20-30 years ago. The results of most studies indicate that Tryptophan can increase drowsiness and decrease sleep-latency (time it takes to fall asleep).  

Hibern8 contains 500mg of Tryptophan per serving, a fairly sizeable dose that may very well help reduce sleep latency, adding the effects of Melatonin.


Melatonin is a hormone secreted by the pineal gland, found in the brain. It is heavily involved in the sleep-wake cycle (by causing drowsiness when secreted). Due to its role in promoting sleep, supplemental melatonin has been used to correct and treat mild sleep disorders, as well as by people who experience mild sleeplessness. All evidence suggests that melatonin works very well when it comes to promoting sleep, but quality of sleep is more difficult to record. A 2004 study, published in the Journal of Clinical Endocrinology & Metabolism, found that melatonin significantly increased REM sleep in subjects who suffer from lower than normal REM sleep durations. Several other studies have demonstrated the ability of Melatonin to increase REM sleep duration, as well as decrease sleep latency (time to fall asleep). 

Overall, Melatonin may be very useful as a sleep aid, and may increase REM sleep, especially in those experiencing REM deprivation, to some extent. Effective doses range from .5-5mg with not much evidence to suggest efficacy is dose-dependent. That being said, Nutrex has opted for the high end of that range, and has included 5mg of Melatonin in the Hibern8 blend, helping to ensure that it will put you right you to sleep.


*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Returns Policy

You may return most new, unopened items within 14 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within three weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (2 to 5 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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