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When to Use:

  • Pre-Workout
  • Post-Workout
  • Anytime



  • 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.



  • 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!


  • Test subjects increased strength by 40%
  • Builds muscle, enhances performance & boosts endurance
  • Powerful 4g dose of leucine, including PepForm® & ActiveTR™ leucine

MuscleTech - Amino 4XL™ SX-7® Black Onyx™ [50 Servings]

  • Goods sold is not returnable, refundable or exchange.

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