USPLabs MaxREPS – Pumps on top of PUMPS!


MaxREPS from USPLabs is a stimulant free pre workout that will give your pumps, pumps!

Well hell’s bells…

USPLabs recently announced the release of a brand new stim-free pre workout that was assured to set the lifting world ablaze, following on the release of Modern PRE. Not much was known except that it was going to help maximize your workout experience.

Well, the day is finally here.

The minds behind the ever popular Jack3d have crafted a non-stim pre workout that will boost your endurance, strength, and most of all PUMPS! MaxREPS delivers a powerful punch that will leave you pumped beyond belief.

This label has just four ingredients, but they’re loaded – and we can’t wait to get our hands on some.

We’ve got the breakdown below, but before we get there, make sure to take a second to check the best deal and sign up for PricePlow alerts:

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MaxREPS Ingredients

If you’re looking for a superior pump profile, you really need look no further. MaxREPS keeps is simple and straightforward utilizing 4 ingredient proven to enhance vasodilation and nitric oxide production, all in significant doses. 1 scoop of MaxREPS+NO3 contains everything you’ll need to get the blood flowing and veins splitting!

Hold onto your hats boys and girls, things are going to get very fun in your workouts!

  • L-Citrulline Malate 2:1 (8g)

    USPLabs MaxREPS Ingredients

    4 simple ingredients give you the skin-tearing pumps you’ve always been looking for. The full label is at the bottom of this post

    This is how to start off an endurance pump pre workout! A nice hefty dose of Citrulline Malate.

    Citrulline malate is a combination of the amino acid L-Citrulline and Malic Acid (malate). Citrulline is a precursor to arginine that’s capable of elevating arginine levels to a greater extent than supplementing with arginine itself.[1,2]

    The reason for this is that citrulline has a much higher bioavailability in the body compared to other well known nitric oxide boosters.[3] The end result is greater NO production which not only enhances blood flow to the working muscles, but also gives a pretty badass pump.

    There’s more though, malic acid is a potent buffer of lactic acid and ammonia in the body which helps to increase endurance and stamina during tough workouts.[4,5]

    So right off the bat, due to the 2:1 ratio, we’re getting ~5.33g citrulline and ~2.67g malate (malic acid), the latter of which helps on endurance.

    That’s enough to feel all on its own, but we’re just getting started though…

  • Arginine Nitrate (2g)

    USPLabs MaxREPS Flex

    MaxREPS+NO3 not only enhances your pumps, but also your endurance and athletic performance.

    Nitrates are potent vasodilators in the body that also exert some cardiovascular benefits in regards to lowering blood pressure.[6,7,8] Aside from boosting pumps though, nitrates also enhance endurance by decreasing the body’s consumption of oxygen during bouts of intense exercise.[9] This leads to improved energy efficiency in the body that helps you last longer and stronger.

    The points mentioned above go for all nitrates, but Arginine Nitrate has one additional benefit. No tolerance build up!

    See, Arginine significantly reduces nitrate tolerance unlike other forms which the body can eventually build up a tolerance to.[10]

    This is easily one of the best pump aids on the market, and MaxREPS is one of the very few that is lucky enough to include it.

    Massive dose – be responsible

    Yet another whopping dose – at best we typically see 1.5g, but many products are popular for dusting in 1g or less. Definitely not the case here.

    With such a high dose, we need to remind you: do NOT mix this with heart medication and definitely not erectile dysfunction medication ever in the same day. A hefty dose of nitrate will lower your blood pressure, and combining it with these can be disastrous.

  • L-Citrulline (2g)

    The Citrulline Pathway

    The Citrulline Pathway

    L-Citrulline? Didn’t we already get some citrulline above?

    Yep, we sure did. But, that also came with some malic acid. Here, we’ve got pure unadulterated L-Citrulline. Stacking pure citrulline on top of the 8g of citmal that we already have will further enhance your pumps but also add a few other benefits.

    L-Citrulline is also a great endurance booster thanks to its role as an intermediary in the Krebs Cycle. It will help buffer ammonia buildup in muscles, which can significantly impact athletic performance. Citrulline will increase endurance and overall ATP production to help sustain you throughout the toughest workouts.[11,12,13]

    So if you take the full serving size here, you have 7.33g citrulline!!! That’s borderline ridiculous, but sometimes you feel like having a borderline ridiculous workout…

  • Vitamin C (200mg)

    USPLabs What Do You Rep?

    Get ready to set rep PRs each workout when you start using MaxREPS!

    Our final ingredient may seem a rather curious choice when some research has indicated that powerful antioxidants such as Vitamin C have a detrimental effect on performance when dosed pre workout.[14]

    While this is a known fact, other research has demonstrated that consuming high doses of Vitamin C can actually enhance performance.[15] Moreover, Vitamin C can augment nitric oxide production by preserving the actions of the Nitric Oxide Synthase enzyme (eNOS).[16,17]

    Used alongside the previous three ingredients in MaxREPS, Vitamin C puts a cherry on the top of comprehensive non-stim pump product.

Flavors Available

So far, Watermelon Limeade and Fruit Punch have been confirmed as the initial flavors when the product is released. More flavors may be in the works, we’re waiting on confirmation from USPLabs.


Despite the fact that USPLabs has been accused of being bad boys by the government, this product goes a long way towards forgiveness. MaxREPS will easily land on our Top 10 Pre Workout List under the non-stim category. It’s extremely well dosed and can be stacked with virtually any stim-based pre workout if you need an extra energy boost heading into your workout. If you’re working out late at night, though, MaxREPS is an ideal choice for late night lifting sessions where you don’t want to dose a high amount of caffeine so close to bedtime.

Either way, make sure to grab a tub of this when it’s released, you won’t regret it.

USP Labs MaxREPS - Deals and Price Drop Alerts

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Disclosure: PricePlow relies on pricing from stores with which we have a business relationship. We work hard to keep pricing current, but you may find a better offer.

Posts are sponsored in part by the retailers and/or brands listed on this page.

Max Reps Ingredients

The full Max Reps Ingredient Label

About the Author: Mike Roberto

Mike Roberto

Mike Roberto is a research scientist and water sports athlete who founded PricePlow. He is a biohacker with extensive experience in supplementation and dietary modification, whose personal expertise stems from several "n=1" experiments done on himself while sharing lab tests.

Mike's goal is to bridge the gap between nutritional research scientists and non-academics who seek to better their health in a system that has catastrophically failed the public.

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  1. Moinard, C; Laboratoire de Biologie de la Nutrition, Université Paris Descartes; “Dose-ranging effects of citrulline administration on plasma amino acids and hormonal patterns in healthy subjects: the Citrudose pharmacokinetic study;” 2008
  2. Ochiai, M; Healthcare Products Development Center, Kyowa Hakko Bio;Short-term effects of L-citrulline supplementation on arterial stiffness in middle-aged men.;” 2012
  3. Windmueller, H; American Journal of Physiology – Endocrinology and Metabolism; “Source and fate of circulating citrulline;” 1981
  4. Giannesini B., et. al.; European Journal of Pharmacology; “Citrulline malate supplementation increases muscle efficiency in rat skeletal muscle;” September 2011
  5. Perez-Guisado J, Jakeman PM; Journal of Strength and Conditioning; “Citrulline malate enhances athletic anaerobic performance and relieves muscle soreness;” May 2010
  6. Cardiology. 1987;74 Suppl 1:12-9.
  7. Nat Med. 2003 Dec;9(12):1498-505. Epub 2003 Nov 2.
  8. Acta Physiol (Oxf). 2007 Sep;191(1):59-66. Epub 2007 Jul 17.
  9. J Appl Physiol. 2011 Mar;110(3):591-600. doi: 10.1152/japplphysiol.01070.2010. Epub 2010 Nov 11.
  10. MacAllister RJ.; British journal of pharmacology; “Arginine and nitrate tolerance;” May 2000
  11. Hickner RC. et. al.; Medicine and Science in Sports and Exercise; “L-citrulline reduces time to exhaustion and insulin response to a graded exercise test;
  12. Moinard C., et. al.; The British Journal of Nutrition; “Dose-ranging effects of citrulline administration on plasma amino acids and hormonal patterns in healthy subjects: the Citrudose pharmacokinetic study;” April 2008
  13. Hoffmann, E.K., I.H. Lambert, and S.F. Pedersen, Physiology of cell volume regulation in vertebrates. Physiol Rev, 2009. 89(1)
  15. Paschilis, V. et al. Low vitamin C values are linked with decreased physical performance and increased oxidative stress: reversal by vitamin C supplementation Eur J Nutr (2014)
  16. Heller R, et al; L-Ascorbic acid potentiates nitric oxide synthesis in endothelial cells . J Biol Chem. (1999)
  17. Heller R, et al; L-ascorbic acid potentiates endothelial nitric oxide synthesis via a chemical stabilization of tetrahydrobiopterin . J Biol Chem. (2001)

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