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!
Amino 4XL™ SX-7® Black Onyx™ contains a clinically researched 4g dose of leucine, shown in a clinical study to help subjects increase their 5-rep max strength by over 40% in just 12 weeks! This study was published in the International Journal of Sports Physiology and Performance.
Amino 4XL™ SX-7® Black Onyx™ features two groundbreaking forms of leucine: PepForm® leucine and ActiveTR™ leucine.
L-leucine is the BCAA with the highest anabolic potential. It activates the mTOR enzyme, which amplifies protein synthesis. Amino 4XL SX-7 Black Onyx delivers L-leucine as free-form leucine, as well as PepForm® and ActiveTR™ leucine to ensure your body gets a steady supply to keep your body in a prime anabolic state.
Amino 4XL™ SX-7® Black Onyx™ also contains a clinical dose of PEAK ATP®. This breakthrough ingredient increases anabolic signaling by activating the mTOR pathway. It also increases skeletal muscle calcium influx and release, which leads to better muscle contraction for improved performance. Finally, PEAK ATP® supports vasodilation and improves blood flow to deliver more oxygen and help you push through those last few reps!
Hard-training subjects who participated in a gold-standard, 12-week human clinical study at The University of Tampa using the exact same dosing protocol of PEAK ATP® as Amino 4XL SX-7 Black Onyx not only gained insane amounts of strength, they also made some serious muscle gains! Subjects gained 8.8 lbs. of lean muscle versus the placebo group, which only gained 4.6 lbs. in 12 weeks – that’s 90% more lean muscle! These were well-trained subjects who were recruited based on strict guidelines to ensure accurate results with hardcore weightlifters!
These subjects also increased their total strength (total strength on bench press, squat and deadlift) by an average of 121.9 lbs. during the 12 weeks versus an average of 49.4 lbs. for the placebo group.
This groundbreaking study was published in Nutrition & Metabolism and firmly put PEAK ATP® in the top tier of supplement ingredients!
L-leucine is the BCAA with the highest anabolic potential. It activates the mTOR enzyme, which amplifies protein synthesis. The three different forms of leucine provided by Amino 4XL™ SX-7® Black Onyx™ ensure that you get a steady supply to keep your body in a prime anabolic state. In fact, a 4g dose of leucine is shown in a clinical study to help subjects increase their 5-rep max strength by over 40%.
Hard-training subjects who supplemented with PEAK ATP® in a 12-week study at a leading university increased strength more than the placebo group. Even better, these same subjects gained 8.8 lbs. of lean muscle versus the placebo group, which only gained 4.6 lbs. – that’s 90% more lean muscle!
Amino 4XL SX-7 Black Onyx delivers a potent BCAA ratio of 5:1:1 to ensure you get a clinically validated 4g dose of L-leucine.
The 1g dose of taurine found in Amino 4XL SX-7 Black Onyx has been shown to increase endurance performance.
A precursor to L-arginine that provides a spike to plasma arginine levels.
Amino 4XL SX-7 Black Onyx delivers coconut water along with an electrolyte blend that helps restore electrolyte levels that are depleted during exercise.
The most abundant conditionally essential free amino acid in your body. It helps support increased cell volume, glycogen replenishment and protein synthesis.
To ensure a high standard of quality and purity, each batch of Amino 4XL™ SX-7® Black Onyx™ undergoes strict quality control and is third-party lab tested and verified to ensure that each bottle meets the highest standards of purity, quality and consistency. Team MuscleTech® researchers work closely with some of the top protein-flavoring professionals in the world to ensure that each serving is mouthwateringly delicious!
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*Per 1-scoop serving
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 ½ scoop with 4 oz. of cold water, 1 scoop with 8 oz. of cold water, and 2 scoops with 16 oz. of cold water. Consume 2 scoops daily.