Core Nutritionals Core Pump Review

Core Pump is Core Nutritionals’ pump-based pre-workout which contains a concise, yet complete blend of some effective pump-enhancing ingredients…

Core Nutritionals Core Pump


Vitamin C

Vitamin C has anti-oxidant properties which give it a variety of health implications.  In the context of Core Pump, Vitamin C may support overall cardiovascular function, specifically by preventing the rapid degradation of Nitric Oxide which generally occurs in response to a stressor (such as exercise).

In this respect, it is similar to many other anti-oxidant compounds.

Agmatine Sulfate

In the past few years, Agmatine has gone from a rare ingredient to a pre-workout staple, though it remains seriously under-researched relative to other popular pre-workout ingredients. Agmatine has been demonstrated to up-regulate Endothelial Nitric Oxide (eNOS), sometimes referred to as the “good” NOS, while inhibiting the other NOS enzymes (the “bad” NOS) in vitro, but human studies are non-existent.

Still, anecdotal reports of Agmatine improving the “pump” are as pervasive as the ingredient itself at this point, so there is something to it.

Core Pump packs a solid 1000mg serving of Agmatine per serving, well within what most would consider the “effective range”.


Citrulline is an amino acid which serves as a precursor to Arginine, and therefore is directly involved in the production of Nitric Oxide.  Unlike supplemental Arginine, however, Citrulline is quite reliable at increasing plasma Arginine and ultimately enhancing performance.

Citrulline has been shown to increase muscular contraction efficiency, meaning less ATP is required for a given workload.  This mechanism explains why subjects who consumed Citrulline were able to perform more reps later on in the workout compared to subjects who consumed a placebo.

Additionally, Citrulline has been shown to reduce muscle soreness effectively making it both a performance enhancing ingredient as well a recovery agent.

Core Pump contains 3g of L-Citrulline per serving.


As mentioned in the Taurine section, Glycerol is osmolytic, meaning it draws water into the cell. It is by this mechanism that Glycerol can preserve hydration status in the cell which explains why it has also been shown to enhance performance during extended exercise where dehydration would be a contributing factor.

So, as a performance enhancer, Glycerol may only induce noticeable enhancements during extended exercise (2 hours or more usually).

The 2g of HydroMax Glycerol found in each serving of Core Pump pretty much guarantees a pretty noticeable pump and could potentially aid in performance during extended exercise.


Nitrosigine is a combination of Arginine and Silicon which appears to be superior to other forms of Arginine.

A 2005 study noted that Arginine Silicate induced greater vasodilation and increase blood flow in mice, as compared to Arginine HCl

Similar results were achieved in a later (2007) study published in “Metabolism” and it was concluded that Arginine Silicate was more effective at raising plasma Arginine levels than Arginine HCl.

Core Pump provides 1.5g of Nitrosigine per serving which seems to be the new standard.

The Bottom Line

Core Pump definitely contains the right ingredients at high enough doses to elicit a noticeable pump, but it’s not clear to us that the formula is worth the premium being charged right now.  If money is no option, go for it!  If Core Pump doesn’t give you a noticeable pump, we’re not sure what would.  On the contrary, if you’re looking for an economical pump PWO to complete your pre-workout stack, you may want to look elsewhere.

Still don’t know which pump pre-workout is right for you?  Check out our Best Non-Stimulant Pre-Workout Supplements List!

[expand title=”REFERENCES” tag=”h5″]

  1. Magal, M. E. I. R., et al. “Comparison of glycerol and water hydration regimens on tennis-related performance.” Medicine and science in sports and exercise35.1 (2003): 150-156.
  2. Wingo, Jonathan E., et al. “Influence of a pre-exercise glycerol hydration beverage on performance and physiologic function during mountain-bike races in the heat.” Journal of athletic training 39.2 (2004): 169.
  3. Hitchins, S., et al. “Glycerol hyperhydration improves cycle time trial performance in hot humid conditions.” European journal of applied physiology and occupational physiology 80.5 (1999): 494-501
  4. Proctor, S. D., S. E. Kelly, and J. C. Russell. “A novel complex of arginine–silicate improves micro-and macrovascular function and inhibits glomerular sclerosis in insulin-resistant JCR: LA-cp rats.” Diabetologia 48.9 (2005): 1925-1932.
  5. Kalman, Douglas, et al. “A clinical evaluation to determine the safety, pharmacokinetics and pharmacodynamics of an inositol-stabilized arginine silicate dietary supplement in healthy adult males.(LB418).” The FASEB Journal 28.1 Supplement (2014): LB418.
  6. Proctor, Spencer D., et al. “Metabolic effects of a novel silicate inositol complex of the nitric oxide precursor arginine in the obese insulin-resistant JCR: LA-< i> cp rat.” Metabolism 56.10 (2007): 1318-1325.
  7. May, James M., and Fiona E. Harrison. “Role of vitamin C in the function of the vascular endothelium.” Antioxidants & redox signaling 19.17 (2013): 2068-2083.
  8. Peterson, Timothy E., et al. “Opposing effects of reactive oxygen species and cholesterol on endothelial nitric oxide synthase and endothelial cell caveolae.”Circulation research 85.1 (1999): 29-37.
  9. Heller, Regine, et al. “L-Ascorbic acid potentiates nitric oxide synthesis in endothelial cells.” Journal of Biological Chemistry 274.12 (1999): 8254-8260.

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