Phenibut 90 Capsules View larger


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Phenibut is a derivative of GABA and is synthesized from it but further processed to improve its functions. Canadian Protein Phenibut has been tested and proven pure to cGMP standards thus making it one of the best Phenibut supplements available.

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Average rating: 5/5 - Number of reviews: 12
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What is Phenibut?

Phenibut (beta-phenyl-gamma-aminobutyric acid) is a derivative of GABA (gamma-aminobutyric acid), but, unlike GABA, phenibut is able to pass the blood brain barrier much more effectively because of the phenyl group added, therefore making its effects more pronounced.

What are the benefits of Phenibut?

Phenibut and Sleep

Phenibut is a very well-known and documented sleep aid and anti-anxiety supplement. Phenibut has been shown to improve sleep quality and duration as well as having a calming effect which also helps to improve sleep, but does not impair our motor skills like sedatives do. Improved sleep quality and duration also has the potential to improve recovery from weight training and intense exercise and also increase growth hormone release as GH secretion is increased during deep sleep.

Phenibut and Mental performance

Phenibut has been shown to improve mental performance in mice by increasing reaction time when given a stimulus to respond to. Also, the calming effect that phenibut provides may help increase the thought process as we tend to feel overwhelmed at times which increases anxiety.

Phenibut and Feeling of well being

Dopamine is one of the hormones that are responsible for feelings of happiness, joy and increased feeling of well-being. Phenibut has shown to stimulate dopamine receptors resulting in similar feelings of happiness, joy and increased well-being.

Phenibut and Improved absorption

As mentioned above, the addition of the phenyl ring allows phenibut to effectively cross the blood brain barrier which GABA shows some difficulty in doing, but makes phenibut a much more potent product.

Phenibut has numerous benefits shown below:

  • Improves sleep quality and duration.
  • Reduces anxiety.
  • May help to increase human growth hormone.
  • May improve sense of well-being.
  • Phenibut effectively passes through the blood brain barrier intact.
  • May improve mental performance.


As a dietary supplement, take 1-2 servings 2-4 times per day. For use as a sleep aid, consume 2-6 servings before bed. Start at the lower dose to assess tolerance. Do not take for more than 3 days in a row without a 2-3 day break.


Canadian Protein Phenibut can be stacked with other supplements for a great sleep aid/anti-anxiety product such as 5-HTP, ZMA, and GABA.

Phenibut side effects

Phenibut is likely safe when used by adults appropriately, and has been shown to exhibit no adverse reactions. Extended use of Phenibut may exhibit withdrawal symptoms including nervousness, feeling easily annoyed and irritated, fatigue, nausea, insomnia, feeling tense, decreased appetite, shakiness, and heart racing and pounding. Please follow the dosage recommendations and do not take for longer than 3 consecutive days.

Supplement Facts



Active ingredients: ß-Phenyl-?-aminobutyric acid.

Inactive ingredients: none.


Caution: Not intended for children, pregnant, or breastfeeding women. Consult a healthcare practitioner prior to use. Consult a healthcare practitioner prior to use if you have health conditions. Store in a cool dry place away from children. Do not use if seal is broken.

Allergen warnings

Allergy Statement: Manufactured in a facility that processes milk, soy, eggs, peanuts, wheat, tree nuts, sulphites, sesame and seafood.

Disclaimer: The above description does not constitute medical advice and is for informational purposes only and has not been evaluated by Health Canada, CFIA, or FDA. Please consult a properly licensed medical professional before consuming nutritional supplements. This product is not intended to treat, diagnose or cure any disease.

Phenibut Reviews

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Verified Buyer

Great product
Dakota on 25/02/2016
London, ON
I am very prone to anxiety, and in moderation this product really helps me to relax. I only take a few times a week in the recommended dosage and it really does the job.

Verified Buyer

Phenibut 200mg
wes_m on 19/02/2016
Professional service, quick shipping and an excellent product. Great for helping with occasional insomnia.

Verified Buyer

Effective though not sure compared to GABA
Frank on 13/02/2016
Sooke, BC
This does seem to help with sleep and relaxation as is claimed. So far I can't tell the difference in how this works for me compared to plain GABA, which isn't supposed to cross the blood brain barrier. I have heard one theory that people with 'leaky gut' or damage to the blood brain barrier can respond to GABA. If that's true I one day hope to repair this damage. It would then be interesting to see if GABA will stop working and if this one will continue to work. I know no one so far that can verify that this works for them but GABA doesn't. GABA is also much cheaper.

Verified Buyer

Great when Cycled
Anonymous on 13/11/2015
Toronto, Ontario
You don't want to try to use this every day, as tolerance will build up quickly. Some people do 1 week on 1 week off. I like doing 5 days on 2 days off. Find what works for you. Great for removing that crazy anxiety many of us get in social situations. Helps you allow your true self to shine through. Never did feel any of the euphoria others have described, but I do become generally happier and more content. Only have bad side effects if I take more than 800mg a day (which you shouldn't need to do--I'm a 190 lb male and that is enough for me). Overall, excellent product. cant give 5 stars because of how easy it is to build tolerance.

Verified Buyer

Alcohol withdrawal syndrome
Tania on 13/09/2015
Toronto, Canada
I find out that this helps to fight symptoms associated alcohol withdrawal syndrome... I bought it and I tried it: it seems working. It improved sleep and reduced anxiety. Also, it helped mental performance. Good luck guys.

Verified Buyer

Jello on 16/08/2015
I'm glad I gave phenibut a try. The first two days trying this stuff was bliss. NO ANXIETY, felt social, more productive, very positive. This stuff works, the effects are legit. I found out on day 3 that phenibut isn't something you can take every day (or at least not the 1.5-2g dose I was taking). Tolerance built fast and I didn't feel it my third day. Also gave me a 'hangover' - I just didn't feel 'right'. Not good. So, I plan on using this 1 or 2 times a week. Do your research before purchasing! Great product.

Verified Buyer

Ferdinand on 19/04/2015
Great supplement to help cut the edge off stressful situations. If you do decide to take Phenibut, please do your research beforehand!

Verified Buyer

Phenibut Cap.
Alois on 11/03/2015
Great product. It is non drowsy and works efficiently for me. Just make sure you don't get used to it (habituated).

Verified Buyer

stuart on 05/12/2014
Great product. Works very we for calming as well as a stimulating affect

Verified Buyer

It's Ok
Patrick on 04/12/2014
Definitely helps you sleep better. Would not recommend taking during the day thou for other effects.

Verified Buyer

Claire on 29/09/2014
It is a very potent product as good as Primaforce.

Verified Buyer

Powerful stuff
Jonathan on 19/08/2014
Calgary, AB
Excellent product, and you have the best service ever. Emails pretty much daily with the status. The product is amazing. Too good really. You probably already know, but if you don't, this product is strong. Take same precautions as you would with any benzodiazepine (Valium, Xanax). Product is strong and totally effective against pretty much any sort of anxiety. I take a mega dose of like 2-4 grams at night, and it puts me in this totally unreal daze the next day. There is literally no better high in the world. And I've done most of em. But with that, you have to take caution. Continued use is going to lead straight to habituation and addiction and then withdrawal, so it can't be more than 1 on 1 off, or 3 on 4 off... I'm not one to speak, I've been taking it every day since I found it (2 weeks now) because it's so incredible, but I feel my bodies signs of addiction. It's scary good, and scary caution is needed. This drug will not be legal much longer (IMO), so get it while the getting is good. And for heaven's sake get it here. CanadianProtein is literally the best site I've used in its category. Cheers. Have fun :)