MuscleTech Amino Build Next Gen Review

Amino Build Next Gen is the sequel to MuscleTech’s original Amino Build. It’s basically an amino acid supplement with some extra bells and whistles…

The emphasis is mostly on the BCAA component of the formula, but it also contains ingredients such as Betaine and Taurine aimed at improving performance. Amino Build Next Gen is available in non-stimulant and stimulant (Caffeine) versions…

MuscleTech Amino Build Next Gen

BCAAs (Leucine, Isoleucine, Valine)

Amino Build Next Gen contains 4g of BCAAs per serving in a classic (not necessarily superior).  That is, 2g of Leucine, 1g of Isoleucine, and 1g of Valine per serving.  While there is no optimal ratio of BCAAs, Leucine is undoubtedly the most potent when it comes to stimulating muscle protein synthesis so it makes sense weight it more heavily than the others.

How much Leucine you should take depends entirely on your fitness goals and your diet, but the effective range is generally 2-5g.  With 2g per serving, Amino Build Next Gen just barely qualifies as effectively dosed.


Taurine is an amino acid commonly found in energy drinks and pre-workout supplements, although as a performance enhancer it is pretty unreliable.  One study has demonstrated improved performance but another study has failed.

However, as a recovery-aid, Taurine is quite reliable and moderately effective when dosed correctly.  Multiple studies have shown that Taurine can reduce exercise-induced oxidative damage in muscle tissue.  When combined with BCAAs, Taurine may also reduce muscle soreness, though not necessarily at the dose present in Amino Build Next Gen.

MuscleTech lists the amount of Taurine in Amino Build Next Gen at 500mg per serving, a pretty low dose as far as most Taurine-containing amino acid supplements go, and not necessarily enough to provide much notable benefit.


Glutamine is probably the most common ingredient found in BCAA supplements aside from BCAAs themselves, although most of the recent research indicates that it isn’t what it was once thought to be.  Glutamine isn’t an effective muscle builder or a reliable performance enhancer, but may help maintain optimal immune function during high intensity, long-duration exercise when immune function would normally be compromised.

In the context of Amino Build Next Gen, we wouldn’t consider Glutamine a particularly crucial ingredient, but it doesn’t hurt the efficacy of the formula either.  The only issue we have is the low dose.  At 500mg per serving, Amino Build Next Gen contains about 1/10th of what could be considered a truly effective dose of Glutamine


The the original Amino Build formula, MuscleTech has included L-Alanine in Amino Build Next Gen, but the reasons aren’t quite clear.  Aside from being involved in ammonia removal (a pro-endurance mechanism), L-Alanine doesn’t have many benefits pertaining to exercise, muscle-building, or recovery.

Considering Amino Build Next Gen only contains 500mg per serving, the significance of L-Alanine in the formula is pretty low.

A little Alanine never hurt anyone, but in this case it isn’t doing much good either.

Betaine Anhydrous

Betaine has recently transcended the boundaries of the pre-workout supplement category and has started to appear in BCAA/Amino supplements more and more.  We discuss the benefits of Betaine in this article for those that are interested in doing some light reading.

Amino Build Next Gen contain 1.25g of Betaine Anhydrous per serving which is half of the standard (2.5g) clinical dose.

The Bottom Line

Amino Build Next Gen isn’t much of an improvement over the original Amino Build.  Aside from an average dose of BCAAs, most of the ingredients are under-dosed so ultimately we’ll be passing on this one.  If you love MuscleTech (for whatever reason) feel free to try it but there are so many clinically-dosed, effective BCAA/Amino supplements out there that blow Amino Build Next Gen away in terms of efficacy.

Still not sure which Amino Acid supplement is right for you?  Check out our Best Amino Acid Supplements list! exists to educate the supplement community and seperate the science from the hype.

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