Betancourt D-Stunner Alpha: An Evidence-Based Review

D-Stunner Alpha is the latest release from Betancourt.  It’s yet another itteration of the brand’s popular pre-workout, D-Stunner.  This time, however, it contains some unique and interesting ingredients and promises “Intense Focus And Energy During Exercise”.

Betancourt D-Stunner Alpha

D-Stunner Alpha Ingredients

The D-Stunner Alpha formula is comprised of two blends, one for endurance/pumps and the other for energy/focus.

Betaine Anhydrous

Betaine is a naturally occurring compound in Beets and has been studied fairly extensively as a strength/performance enhancer.  Betaine has been shown in multiple studies to increase strength and power output during resistance training.  This makes it of interest to just about everyone who lifts weights.

If you’re interested in learning more about Betaine, check out this article.

Unfortunately, on a per serving basis, D-Stunner Alpha probably doesn’t contain a clinical dose of Betaine since the entire blend is 3250mg and research indicates you need 2.5g/day.  Two servings may provide a solid dose, but it’s too bad Betancourt is stuck on proprietary blends still!


Beta-Alanine does not increase actual strength like Betaine but is highly reliable and effective when it comes to increasing muscular endurance.  It does this by converting into Carnosine, a dipeptide which accumulates in muscle tissue and reduces Lactic Acid buildup during workouts.

Beta-Alanine has been proven to increase muscle Carnosine concentrations and ultimately increase muscular endurance in multiple human studies.  It definitely works, but at what dose?

The clinical range for Beta-Alanine is 3-6g, with 1.6g being the absolutely lowest dose shown to increase Carnosine levels overtime.  D-Stunner Alpha probably contains less than 1.6g of Beta-Alanine per serving, given that it is listed second after Betaine.  Again, looks like two servings would be neded to yield a clinically effective dose.

Malic Acid

Malic Acid is involved in a wide variety of bodily functions, most notably the Kreb’s Cycle by which energy is obtained from nutrients.  It theoretically could assist with energy production, though this is not to be confuse with perceived (mental) energy, like from Caffeine.

There isn’t actually much research on Malic Acid when it’s not combined with Citrulline as Citrulline Malate, so there is no clinical dose/range.  D-Stunner Alpha probably contains less than 1,000mg of Malic Acid, but we don’t know because Betancourt used a proprietary blend.

Agmatine Sulfate

Agmatine has been shown to increase Nitric Oxide production in Endothelial cells, but most of the research is in vitro and absolutely none of the research invoves resistance training.  For now, the benefits of Agmatine for athletes remain speculative and dosing is all over the place.

Generally speaking, you’ll find Agmatine dosed at 500-1000mg, but we suspect D-Stunner Alpha contains much less.  Probably around 250mg would be our guess.

Alpha GPC

Alpha GPC is the most bioavailable form of Choline and is one of the few forms that can easily cross the blood-brain-barrier and be converted in Acetylcholine.  Acetycholine is a neurotransmitter that controls muscle contractions, and this is the assumed mechanisms by which Alpha GPC enhances power output.

This strength enhancement has been observed in multiple studies at this point, so it is considered fairly reliable.  Ultimately, Alpha GPC makes for an excellent addition to any pre-workout, but it’s almost always under-dosed.

The clinical dose for increasing power output during exercise is 600mg.  Doses lower than that have not been tested.  While D-Stunner dose appear to contain more Alpha GPC than Caffeine (a good sign), it still doesn’t contain a clinical 600mg dose, so it’s not clear how effective it is here.


Caffeine forms the base of the energy/focus blend in D-Stunner Alpha.   By triggering the release of Noradrenaline, Caffeine is capable of increasing energy and focus in the average person, though dosing varies widely.

It makes for a great addition to any pre-workout supplement, but we actually don’t know how much Caffeine is in D-Stunner Alpha which makes it very hard to determine how well it’ll work.


N-Methyltyramine functions as a monoamine oxidase inhibitor, effectively amplifying the effects of stimulants such as Caffeine which release monoamines (like Noradrenaline).  Although there isn’t a whole lot of research, it would appear that NMT is an effective mood booster and, when combined with Caffeine, adds an element of focus and clarity that most people find quite powerful.

There is no clinical range but common doses are arond 50mg of NMT.


Rauwolscine is chemical relative of Yohimbine, meaning it functions as an alpha-adrenergic receptor antagonist and can increase the amount of fat your body burns during exercise.

Rauwolscine is more potent than Yohimbine, appears to be prone to less side effects, and also appears to have stronger mood-boosting properties.   We discuss it much more in-depth in this article, for those who are interested in this unique compound specifically. Common doses range from 1-3mg.

Huperzine A

Huperzine A is an Acetycholinsterase Inhibitor, meaning it prevents Acetycholine from being broken down so quickly.  The result is more Acetylycholine in the brain which may be useful for athletes looking to increase muscle contraction force.

Unfortunately, no studies have been conducted on Huperzine A for the purpose of enhancing athletic performance, so all we have for now is theories, but it does make for an interesting addition to any pre-workout supplement.

Ingredient Takeaway

The endurance/strength-boosting ingredients in D-Stunner Alpha appear to be pretty under-dose on a per serving basis.  Most likely, you’ll need atleast two servings to acheive clinical doses of each ingredient, possibly even more.  We can’t be sure because Betancourt is using a proprietary blend on this one.

In terms of energy and focus, however, D-Stunner Alpha will definitely deliver.  Even with the proprietary blend, it’s easy to tell that the ingredients for increasing energy/focus are dosed appropriately, so if that’s all you care about your good.  Just don’t expect massive pumps and better endurance from one serving

Is D-Stunner Alpha Safe?

D-Stunner Alpha contains undisclosed doses of stimulants, meaning you should be careful when determining your ideal dose.  At one serving, there is no reason to suspect that D-Stunner would be harmful in any way, and probably not even at two servings.  Definitely don’t exceed two servings though!

Betancourt Sticking With Proprietary Blends

We’re deeply saddened to see that brands are still using proprietary blends to conceal the doses of individual ingredients in their formulas.  Betancourt has always used proprietary blends, atleast as far as we need, but we we’re hoping they’d come around since it is, afterall, 2016.  If you’re a Betancourt fan, let them know!

The Bottom Line

D-Stunner Alpha will deliver when it comes to energy/focus for most people, but not so much when it comes to pumps and endurance.  If you’re more about the energy/focus/mental calrity aspect of pre-workout supplements, then you may enjoy D-Stunner Alpha.  If you seek pumps and better muscular endurance, you’re almost surely going to be dissappointed with this one.

If you’re still not sure which pre-workout is right for you, check out our Top 10 Pre-Workout Supplements List. exists to educate the supplement community and seperate the science from the hype.

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