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  • USN HGH 550
  • USN HGH 550
  • USN HGH 550


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Gamma-Aminobutyric Acid is a gamma neurotransmitter that plays a significant role in the hypothalamic-pituitary function affecting all hormonal functions of the body including Growth Hormone (hGH). Gaba stimulates the production of growth hormone. Studies have shown up to 550% increase in plasma growth hormone levels after GABA administration, unmatched by any other nutritional means.

HGH has been found to facilitate the metabolism of fats in the body resulting in startling fat loss. HGH is widely known for its powerful muscle building effect. It tends to decrease with age, making it harder to lose fat and build muscle.

GABA found in USN HGH Stimulator increases the depth and quality of sleep, and obtaining more rest can lead to greater energy throughout the day.

All of these benefits together translate to an overall increase in wellness, youthfulness and a definite rise in energy.

Category: Vitamins & Supplements

How To Use It

• Mix 3 to 5g (1 to 1.5 teaspoons) into 250 ml water and take immediately before sleep or, at the risk of experiencing drowsiness, take 30 minutes prior to resistance training for a more pronounced effect.

• As an alternative 3g can be taken prior to training and another 2g before bedtime.

• Take on an empty stomach (at least 60min after your last meal).

Most Recent of 42 Reviews
Review by Kogs (Date 7/25/16)
Very effective...
Review by Seunsterz(Date 12/4/15)
This is a good product. I use it as a pre-workout and before bed. I don't really like the taste that much,but I do love the gains..nice lean muscle.
It also makes me sleep peacefully at night.
not bad still room for improvement
Review by GCsterling(Date 11/18/15)
First things first it helps you sleep comfortably great amount of energy after a few minutes well it takes a long time to see results and you get demotivated pretty easily gains motivate you but you don't see them very early with this product and the price is reasonable all though the prices shot up!!!!
Take your fitness goal to the next level.
Free Delivery
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Orders over R200
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Expected Delivery
date for your parcel.
Johannesburg, Pretoria, Bloemfontein, Durban
Fri 28 October or Mon 31 October
Cape Town, Port Elizabeth, Outlying Areas
Mon 31 October or Tue 01 November
Nutritional Information

Serving Size: 1-1.5 teaspoon (3-5g)
Servings Per Container: approx 50

 Amount Per Serving % Daily Value
hGH Pure Gamma-Aminobutyric Acid
As with all supplements, please consult your physician first (especially if you have a medical condition). Do not use if you are pregnant/lactating, or under the age of 18. Some minor tingling of the skin and shortness of breath may occur. This is a characteristic of GABA and should disappear within four days after you start using this product, if not immediately. If anxiety, dizziness or depression is a result,lower dosage or discontinue. Remember that an adequate state of hydration must be maintained when using this product. Taking more than the recommended dose will not improve results and may cause adverse reactions. Do not exceed the recommended daily intake. Keep this product in a cool, dry place out of reach of children.
More Customer Reviews
great result
Review by harrybuilt(Date 5/31/15)
Great for sleeping, no fuzzy feeling, no nightmares and great preworkout, avoid having a heavy meal before you take it, because you feel sick while sleeping...but great supplement (y)
Doesn't seem to have any impact
Review by Zyzz(Date 5/28/15)
Highly doubt that it had any benefits in regard to gaining muscle mass or losing fat
great product
Review by starr(Date 10/29/14)
An awesome pre workout good muscle gains great sleeping aid. will recommend it to anyone.
Good product
Review by Gym junkie(Date 6/6/14)
Ummm. its affordable. the tingling sensation is kinda too much but it feels great though. gaining a lot of lean size.
Great Product
Review by Giga(Date 5/21/14)
2 weeks in and good gains....sleep well ..no tingling or fuzzy feelings.....first few days slight headache and a little drowsy after gym...but feel great now.....no after effects...no great weight loss ..Yet !....Early days .....will keep posted.
Half and Half
Review by Reezy(Date 12/11/13)
Took this for a month, took it before gym and/or before bed. I found pretty intense increases in energy when taken before the gym, it makes a good pre-workout. The only problem I found is although I could sleep easily taking it, I had nightmares every night without fail. Waking up in the mornings were a mission though.
Good results
Review by Izak(Date 10/2/13)
As a first time user of this product, I was a bit startled by the tingling sensation at first, but the HGH induced sleep was awesome. I am about halfway into my first bottle and have picked up on some good gains so far. Haven't noticed the fat loss described on the back of the bottle yet. Still on 18% body fat.
Good product
Review by John(Date 8/27/13)
Overall I am a good sleeper so I can not comment on the sleeping so much. I gain 1/2 inch in arm size (with hard training) and I must say that power wise it gave me a bit more. No side effects from myself. I use it before I go gym in my water or sometimes vitamin water. Price is good.
Great Product
Review by Wsm(Date 4/2/13)
GABA , USN doesn't taste very nice but the tingling sensation is amazing, then again haven't had any Gaba that tasted good overall if you willing to spend a little bit extra on GABA this is the product to spend it on. Sleep aid (deep sleep) and not directly muscle gain supplement.
Keeping me awake
Review by Wesley(Date 3/8/13)
Ok so one of the main reason I bought this product was for the apparent aid in sleep feature but it has had the opposite effect on me, take me about 3 hours just to fall asleep and then i still wake up numerous times during the night. hoping these side effects will go away after time. as for the other side, can feel it working immediately after taking it, very warm feeling and tingles over entire body. good product for lean gains not so good for sleep. i'll try ZMA next month.
Review by Kevin(Date 1/26/13)
Definitely helped with my sleep and strength went up. The taste didn't bother me.
I will stick with this product
Review by Brian (Date 1/11/13)
After stopping gym for a few years it was difficult to get back up to the weights I was pushing in back then. After a month of gym I started using this product and I must say, it works. I have recommended it to a few guys and all have seen improvements in their sets. The sleep thing I don't really notice, but some of the other guys say it helps them. Overall a good product.
Interesting product
Review by Ari(Date 10/15/12)
Not the greatest taste and tingles like mad, the tingles did not subside for me for the duration of the whole cycle. I also felt tired in the mornings, but you sleep very deep, so it takes till midday to recover from the deep sleep. I had noticeable gains as I was only using this supplement with Protein shakes for a month. I would say it was worth the money spent
good product.
Review by chris(Date 9/8/12)
I saw good results with this product. Increase good quality sleep, but after the first container the affects were reduced and did not realize the same effects.
It lasts quite long and has a strange tingle taste, but i enjoy it, it something unusual.
well priced and saw good gains in beginning
awesome results
Review by Lucas(Date 6/24/12)
i used this product a while back in conjunction with a mass gainer protein and I've never had such good results, I weighed 60kgs at the start and was 65kgs by the end of the 4th straight week of using it. the only problem I had was that whenever I took it I would start to tingle and have hot flushes (they do warn that such reactions may occur). other than that it is a great supplement for gaining plenty of lean mass
Skeptical but very optimistic
Review by Kgotsofatso(Date 6/19/12)
I rated Price 4 stars because i am still to know if its a 5 star product. read a lot about this so I'm quite optimistic about the end result of this. Tingly feeling about 15 minutes after taking it. almost like a hot tingly feeling - so i guess its working somehow? so 4 stars to that. 5 stars for the taste because i don't taste the bitterness everyone seems to be on about. there is a bit of a taste, but it doesn't linger. Lets see how this one goes.
Great feeling
Review by me (Date 3/12/12)
I started to like the gym more great feeling when you sleep. Overall probably my favorite supplement so far! After taste is bitter, but I like it
Not effective
Review by Wasim(Date 2/27/12)
taste is not so good , but reasonable it does give a minor tingling sensation abt 15 min after nothing too hectic. I haven't noticed any sleep improvements as yet but my muscles seemed to recover quickly after exercising don't know if its the hgh or glutamine or both that resulted in this. Its a bit pricey compared to the GABA advertised on this site
Hi Gear
Review by HGym(Date 1/10/12)
It is definatly gives a sensation intresting product !!!
the worst
Review by American muscle(Date 1/2/12)
Every one who has read my reviews before would know I always have something positive to say..Well there's nothing positive about this product cheap USN rubbish.Never have I had a product that is more disappointing then this.Wouldn't surprise me if it was baking soda in the bottle
Review by vince(Date 12/6/11)
good sleep. i like the gym more
I like the taste
Review by Indragasen(Date 11/20/11)
I started taking it on 04/11/2011. So far I only noticed tingles about 10-15min after taking it. I do feel quite drained during the day. Not sure if this has anything to do with the HGH. Gonna add a energy booster and see how it goes. I like the taste.
Frggen hectic
Review by Greg(Date 9/21/11)
This stuff is insane. After ten minutes I get the most hectic tingling sensation in my muscles... My vascularity increases big time. I trained my legs on the Sunday, i was stiff for four days afterwards, the muscles which were stiff after taking hgh, became extremely warm for some reason, felt great! Slept very very well and I still woke up string for morning sessions of cardio.. Overall probably my favorite supplement so far! After taste is bitter, but I like it
Pretty Good
Review by T-Rex(Date 6/14/11)
About halfway through my bottle now. The tingles and shortness of breath shortly after dosing are quite a high. Sleep is MUCH deeper, and it also assists me in falling asleep. You will wake up miff if you don't get enough sleep, but it generally improves energy levels in the mornings.

The gains from my other supps have been good, but since I have started HGH 550 my gains have improved. My muscles are not only gaining lean mass but improving in shape, consistency and are looking much more cut.

It is virtually tasteless, your water will have a very slight chemical taste but you don't even notice it after the 3rd of 4th serving.

Only thing that makes me cautious about this product is a reduction in sex drive, hormones are things you shouldn't really meddle with. I cannot pin-point it to this product, but the time line does.
Review by Deezo(Date 3/8/11)
Great feeling when you sleep, in terms of growth not very satisfactory. How long should one take HGH before noticing results?
Review by The Beast(Date 1/25/11)
I have not used the product yet, but after consulting a lot of sources, I can confidently say that this stuff is incredible. It is not really a supplement but a natural amino acid that occurs in the brain. It helps induce deep sleep, increase the production of growth hormone which helps with muscle growth, induces relaxation and increases energy levels.
Takes my breath away!
Review by ShapeLy(Date 12/12/10)
Shortness of breath,don't feel good for about minute or two then the feeling goes away. Had no tingling but hubby did & got hot flushes. Didn't sleep well at all very restless....
Review by Jacques (Date 10/16/10)
since i used HGH i sleep better and i also find that my sugar levels is lower in the mornings. between 3.4 and 4.5 mmol. so for diabetics it's worth using HGH. I'm currently using HGH with 17 testo methox and i must say it really makes a difference to the way i feel and look.
Speed up your recovery!
Review by Johan(Date 9/8/10)
Incredible product. Been using it for 2 weeks now, and my sleep has been amazing - very deep sleep & I feel well rested when I wake up in the morning. This has directly resulted in better recovery from my workouts, which has translated in me working much harder during the next session! I definitely feel more rested and recovered when I hit the gym for the next workout.
Review by broken(Date 6/24/10)
used this product a few times and every time felt the tingle and good sleep, but the best part was the weights i could push, top notch product and would recommend to anyone!!
Review by Luke(Date 6/7/10)
I have tried this product once, and now am giving it another go. SLeep is defintely alot deeper. You just have to get past the rush you feel shortly after taking it
Review by Devon(Date 5/27/10)
Didnt experience much muscle growth or strength increases but promoted restful sleep and improved energy levels
Really Works
Review by Hanno(Date 5/14/10)
I used GABA before and love this. This stuff really works. I sleep better at night and feel more rested in the morning. Worth every penny!
so so
Review by Trojan(Date 5/9/10)
Took 5g before bed every night.Within a few minutes you feel a tingle in your mouth and scalp and have a shortness of breath but it does make you sleep deeply and have more energy
good all round
Review by matt(Date 5/4/10)
when using this supplement my energy levels went up from day one. this supplement also gave me a deeper sleep and left me feeling less tired during the day. awesome
sleep & strength
Review by Hendre(Date 5/3/10)
I bought this product to give it a try. I don't know if i gained alot of muscle with this cause i didnt really watched my weight but it does make you sleep much deeper and it definitely made me stronger. Lift more weight and had more muscle endurance after about 2 weeks.I took 5g every night before bed and then i have this tingly rush through my whole body.making me feel numb for a few seconds! Kinda fun!! hehe. Id say it has some effect on strength and sleep.
Review by Johan(Date 4/24/10)
When I first used this product I had incredible high energy levels(good sleep)
This is a great product for building muscle and dropping body fat
Good Stuff!!
Review by Baboon(Date 4/19/10)
Took about 1g every evening and it makes me sleep better. Slight tingle in the scalp for a couple of minutes, but this stuff really works!
Incredible stomach cramps
Review by Llewelyn (Date 4/13/10)
I got some of this on a promotion with USN's Fastgrow. Took it prior to bed as instructed and my stomach blew up like a balloon...incredible pain for about 1-2 hours until air started blowing out of all my holes...I feel lucky I made it through that night and consequently threw it away the next morning.

This product is a safety hazard.
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