Amino 4XL™ SX-7® Black Onyx™ - Fruit Punch Explosion | GNC

MuscleTech™ Amino 4XL™ SX-7® Black Onyx™ - Fruit Punch Explosion


Item # 802226


Size: 50 Servings

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Note: This product cannot be sold in Canada


Product Information


Next Generation 5:1:1 Musclebuilding BCAA Formula
  • Test Subjects Increased Strength by 40%*
  • Builds Muscle, Enhances Performance & Boosts Endurance*
  • Powerful Dose of Leucine Including PepForm® & ActiveTR™ Leucine*
The new, supercharged musclebuilding amino formula from MuscleTech® SX-7® is here. Introducing, Amino 4XL™ SX-7® Black Onyx™, the only BCAA product that delivers a powerful 5:1:1 BCAA ratio (which includes both PepForm® leucine and ActiveTR™ leucine) combined with the clinically studied musclebuilding power of PEAK ATP®. Amino 4XL™ SX-7® Black Onyx™ also contains several other popular ingredients, such as taurine, L-citrulline, glutamine and an electrolyte blend that features coconut water. With Amino 4XL™ SX-7® Black Onyx™, you get everything you want in a BCAA formula and more!*

Label (click image to enlarge)


Take 2 scoops per day. Amino 4XL™ SX-7® Black Onyx™ can be taken pre-workout, during your workout or at any other time of the day. Mix 1/2 scoop with 4 oz. cold water, 1 scoop with 8 oz. of cold water, and 2 scoops with 16 oz. of cold water. Consume 2 scoops daily.
Contains coconut ingredients. Processed in a facility that also processes milk, soy, wheat, egg, peanut, tree nut, fish and shellfish ingredients.


For adult use only. Do not use if pregnant or nursing. Consult a medical doctor before use if you have a medical condition or before starting a diet or exercise program. KEEP OUT OF REACH OF CHILDREN.

Other Ingredients

Malic Acid, Natural and Artificial Flavor, Citric Acid, Maltodextrin, Silicon Dioxide, Sucralose, Calcium Silicate , Acesulfame Potassium, FD&C Red No. 40
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.

Nutrition Facts

Serving Size  1/2 Scoop
Servings Per Container  50

Amount Per Serving     % DV

Tri-Phase 5:1:1 Amino Matrix  2.8 g   **
L-leucine (as instantized L-leucine, ActiveTR™ L-leucine and PepForm® L-leucine peptides)  2 g   **
L-Isoleucine   400 mg   **
L-Valine  400 mg   **
Cell-Volumizing Aminos  1.25 g   **
Taurine  0.5 g   **
L-Glutamine  0.5 g   **
L-Citrulline  250 mg   **
Peak Muscle Matrix  100 mg   **
PEAK ATP® (Adenosine 5’-triphosphate disodium salt)  100 mg   **
Hydra-Electrolyte Blend  85.25 mg   **
Sodium Chloride  32.5 mg   **
Dipotassium Phosphate  27.5 mg   **
Coconut Water (as Cocos nucifera)(Fruit)  25.25 mg   **

** Daily Value (DV) not established.


4.9 / 5.0
60 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Stackable with other Black Onyx Products
A great and tasty supplement to use before your workouts. Got that nice boost of energy to get me through the day.
July 24, 2017
Great taste
Great taste to take while working out. Increase recovery time.
July 21, 2017
Off the chain....
July 18, 2017
1 month ago
Great Product !!!
This Product works great !!! It does build strength, I remember when i was benching 205lbs yeah i know tbats weak but after taking this Creatine i was able to max out at 225lbs i Highly Recommend This Product To Anyone Looking To Build Muscle.
July 18, 2017
Great product... Hits ya within 15 mins and lasts for hours... POWER through your workout.
July 18, 2017
Great stuff
Seriously some of the best amino I've ever had! I've been using amines for a little while and this one is by far my favorite. If your looking for a pre during or after workout supplement this the one. My only complaint is it doesn't mix the best but if that's all I got to deal with so what.
July 13, 2017
Genuine Tasting Product! Amazing Taste!
SX-7 Black Onyx Amino 4XL.
Let me start this review by saying wow, what a genuine tasting product! If you are looking for a bcaa that taste like what it is truly supposed to (Fruit Punch Explosion) look no further! The flavor is 110%. I Could not be more pleased with the taste as this by far beats any expectations. This product comes with 50 servings of ½ a scoop. Recommended daily intake of 2 scoops. I have been taking this product during my workout with 1 scoop, 10 grams of powder. 1 scoop contains, 35 calories, 0 grams sugar!, 4 grams leucine, 1 gram taurine, and 1 gram glutamine with some extra ingredients I have not listed. I mix my 1 scoop with 8oz to 10oz of water. The powder blends nicely leaving no chunks or grit. After consuming this product I truly feel less fatigued and have less muscle soreness following after my workout. I have noticed come next morning I am feeling little to no soreness at all and am ready to hit my next workout. This amino acid blend does everything a bcaa should do with aiding a workout recovery. I always include a bcaa in my workout routine to help keep me on my schedule and not missing days due to tiredness and soreness. This product has for sure won me over with its great benefits and amazing taste. I will be turning to this product when I am in need. In all this is a genuine product put out by muscletech leaving me liking there products more and more each time. I truly believe in their company and the products they offer and will purchase items from them over competitor brands. 10/10 product.
July 11, 2017
Powerlifting is hard on the body, this helps with recovery!
I like this product. I lift heavy and hard. I think that it helps my body recover from all of the abuse I put it though. It mixes extremely well. I feel that the stronger I make it, water/mix ratio, the better it tastes to me. I also feel that it gives my body a little extra endurance to lift the extra 5lbs.
July 6, 2017
Amino 4XL™ SX-7® Black Onyx™ - Fruit Punch Explosion

Let's start with a little background! I hate biased reviews, and this is going to be far from it. A little about myself is that I've been an avid lifter, one who goes after both strength and aesthetics. I've been training and dieting for those goals for about 10+ years. I use supplements each and every day. Some include: multi vitamins, essential fatty acids, amino acids, protein powder and bars, pre-workouts, intra and post workouts. I often use things that are clinically dosed with quality ingredients, but I can occasionally grab the super deals I can find.

Ingredient Profile (8/10)
I'm not going to bore each and every one of you individuals by going through this product ingredient by ingredient but rather just highlight what I feel is noteworthy. IT SHOULD BE NOTED I WILL BE REVIEWING THE PRODUCT AT THE FULL SERVING BEING ONE SCOOP!

-BCAAs! I like that this product has 4 full grams of Leucine! BCAAs are crucial and they are what we look for an a... wait for it... BCAA/Amino Acid product! I wish that this product did have around 10 grams per full serving! That is usually what I look for in a BCAA product!

-PEAK AT- This is always an interesting ingredient that is added... I feel that the ingredient helps out with a boost of sustained energy during a workout. I feel that this ingredient is the worth the extra dollars spent on this product. I don't know whether the boost is from a placebo effect or whether it actually works. I'm a science buff, and believe that it is truly more from being effective versus the placebo effect.


Taste (8.5/10) I am reviewing the fruit punch explosion flavor, and it's a great flavor. To be fair I have only used this product at the full scoop as I am over 200 lbs and like to attain more amino acids intraworkout. I use my amino acids with a full shaker cup (20 oz) of water, and it leaves this product with a mild fruit punch flavor which I enjoy sipping on. Muscle tech has got the flavor right on this one, especially with the amount of leucine included which can usually make a BCAA product chalky and bitter!

Mixability (10/10) The mixability is no problem what so ever! Add water, add the powder, shake and you are good to go!

Dosing (10/10) I love the dosing of the full scoop for this product. Has everything you need for an amino acid product with all the benefits of additional energy and performance from the ATP. The added pump ingredients are awesome as well. Put it like this, if you wanted to make an amino acid product you would come up with an ingredient profile very close to this product!

Effectiveness (10/10)
It does what it is supposed to do! But that being said, IT IS NOT A MAGIC ANYTHING! Don't expect to gain 10 pounds of lean pure muscle just from sipping on this during each workout! It will help though with SUPPLEMENTING to your needs!

Amino acids are crucial, especially when cutting body fat and trying to hold on to hard earned muscle. I am currently on a keto diet, and this product has aided me greatly while I started this new diet. This product will work for you, as long as you work for you!

Value (5/10)

Side Effects (10/10)
All are positive for me. I have experienced no negative side effects. Increased pumps, energy, endurance, and workout qualities!

I would definitely recommend this product to my family and friends in search of its qualities. It has an awesome profile, taste, and is exactly what you want with this kind of amino acid product! Try it, and you won't be disappointed.
July 6, 2017
In love
Helps me with work and stops leg cramps definitely going to buy !
July 5, 2017