L-Arginine SX-7® Black Onyx™ - Icy Rocket Freeze™ | GNC

MuscleTech® L-Arginine SX-7® Black Onyx™ - Icy Rocket Freeze™


Item # 802252
Note: This product cannot be sold in Canada

Product Information



L-Arginine SX-7® Black Onyx™ delivers a powerful pump-inducing matrix that quickly disperses into your bloodstream when you need it most! This advanced arginine matrix supplies three forms of L-arginine, the critical precursor to nitric oxide. Plus, it’s sugar free and non-stimulant so it can be stacked with any other SX-7® Black Onyx™ product for your best workouts.*

Powerful Nitric Oxide Precursor
MuscleTech® researchers developed the most advanced, ultra-pure, triple-sourced L-arginine formula ever. L-Arginine SX-7® Black Onyx™ delivers 6,000mg of L-arginine, including ultra-pure micronized L-arginine for rapid uptake and dispersal in your body. Flooding your body with this powerful nitric oxide precursor primes you for extreme pumps and enhanced blood flow and nutrient delivery.*

Scientifically Superior Formula
When you train, your body releases calcium in the endothelial cells that line your blood vessels. This causes the enzyme nitric oxide synthase to create nitric oxide from available L-arginine. As the nitric oxide leaves the endothelial cells, the blood vessels relax, causing vasodilation. By supplying a massive dose of L-arginine to your body, L-Arginine SX-7® Black Onyx™ helps trigger extreme nitric oxide production for superior vasodilation effects and massive musle pumps.*


Nutrition Facts
Serving Size  1 Scoop(s)
Servings Per Container  35

Amount Per Serving     % DV

Calories 30  

Total Carbohydrate 2g   1%
Sugars 0g  
Vitamin C 60mg   100%

L-arginine (as L-arginine, L-arginine alpha-ketoglutarate, and PepForm® L-arginine peptides)  6000 mg   **

** Daily Value (DV) not established.
Other Ingredients
Maltodextrin, Citric Acid, Malic Acid, Silicon Dioxide, Natural and Artificial Flavors, Acesulfame-Potassium, Sucralose, FD&C Blue No. 1
Contains milk ingredients. Processed in a facility that processes milk, egg, soy, wheat, peanut, tree nut, fish and shellfish ingredients.
Label (click image to enlarge)

How To Use

Mix 1 serving (1 scoop) with 12 to 16 oz. of water and take once daily. For muscle pumps, take 1 scoop 20 to 30 minutes before your workout. Do not exceed 1 serving (1 scoop) in a 24-hour period. Read the entire label before use and follow directions provided.
Not intended for use by persons under 18. Do not use if pregnant or nursing. Do not use if you have had a myocardial infarction (heart attack). Inhalation may amplify the inflammatory airway response in people with asthma. Consult a medical doctor before starting a diet or exercise program or if you have a medical condition. For use by healthy individuals only. KEEP OUT OF REACH OF CHILDREN.
Distributed by Iovate Health Sciences U.S.A. Inc. 1105 North Market Street, Suite 1330, Wilmington, DE 19801. Made in the U.S.A. from international ingredients.


4.6 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Very good product. After approx 1 week of regular use could feel the improved blood flow. Pre work out by 30 minutes gave me rhw best pump/results. Not irritating to stomach
May 17, 2018
Solid workout
I recommend this product to everyone, especially seniors out there that value their health. The product gives me the oomph I desire to complete a good strength workout, then finish my exercise with what seems like a great pump. Try it is all I can say to prove it to yourself.
May 8, 2018
5 months ago
Pump and Blood Flow
This product is packed with 6 grams of arginine. It is definitely great for blood flow and N.O.Production. Great to take with pre-workout. Taste and mix are excellent. I take one scoop per day. It is a fair value.
September 15, 2017
1 year ago
I'll be buying it again.
First off the taste is good.
I try to take it 15 - 20 minutes before a workout to get it in. But, even when I've used it during the workout, I can feel it kick in giving me that added boost to get through it.
Like I said, I'll be buying it again.
March 2, 2017
This stuff is great! Gives me a great pump at the gym and I typically stay a bit longer on the mornings I take it. I go at 5am, so I take it around 4:30am to give it time to kick in. Overall, awesome product.
December 7, 2016
what you need
This is an amino acid primarily found in red meat. so If you are a plant based protien consumer or dont eat meat, then you may need this product to get those essential aminos you are not getting. Muscletech is top of the line stuff and black onyx is really pure. overall very happy
December 6, 2016
Must Try!
I usually don't use anything that is sugar-free or non-stimulant based because I prefer them. But this one is a staple in my supplement pile!
December 4, 2016
Love it!
This is great! L-Arginine can be used anytime since it doesn't have any stimulants and is sugar free. I have combined this with my Hydroxycut Black Onyx as a preworkout and I love the combination. When I use this I feel a great pump during every workout but can even use it before bed since it doesn't have any crazy energy ingredients in there. I'm really happy I received this as a free sample from MuscleTech.
December 3, 2016
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