NITRIC OXIDE POWERHOUSE. You know the feeling. The 'pump'—that addictive, euphoric sensation when oxygen and nutrient-rich blood floods your muscle fibers, leading to intense, results-producing workouts that shatter your personal records. N.O. Pro was scientifically formulated to help you maximize energy, strength, and stamina during every workout so you never waste a set. Trust us, you'll feel it.
HOW IT WORKS. A lack of oxygen reaching your muscle cells could be short-changing your workouts. The powerful L-arginine, AAKG, citrulline malate, and beet root ingredients in N.O. Pro work synergistically to funnel clean oxygen and nutrient-rich blood straight into your muscle cells. This pre workout fuel kick starts the anabolic process, and means greater endurance and stronger pumps for record-setting workouts. Start rethinking your so-called 'limits'.
The Dual-Pathway Biochemical Advantage
Most single-ingredient pump supplements rely solely on exogenous L-arginine. However, oral L-arginine is largely metabolized in the gastrointestinal tract and liver by the enzyme arginase (first-pass clearance). Zhou Nutrition N.O. Pro solves this pharmacokinetic barrier by targeting two physiological mechanisms:
Pathway 1: The L-Citrulline / eNOS Enzyme Axis
Citrulline bypasses first-pass hepatic metabolism and is enzymatically converted in the kidneys into bioavailable L-arginine. This fuels endothelial nitric oxide synthase (eNOS), causing vascular smooth muscle relaxation via elevated cyclic guanosine monophosphate (cGMP) synthesis.
Pathway 2: The Nitrate-Nitrite-NO Cascade
Standardized Beet Root (Beta vulgaris) delivers natural dietary nitrates (NO3-). These are reduced by oral commensal flora to nitrite (NO2-) and subsequently converted to nitric oxide in hypoxic, exercising skeletal muscle tissue.
PUMP LIKE A PRO. Whether you're a strength and power athlete, or just looking to finally achieve your personal goals, N.O. Pro can be the secret weapon that truly takes your workouts to a new level. Pro's know how crucial the ingredients in N.O. Pro are to maximizing hard work in the gym, and Zhou Nutrition has combined them into convenient capsules that you can keep in your gym bag. No special scoops or messy powders required.
HEART HEALTHY. Give your heart some extra love by adding N.O. Pro to your exercise routine. As you may know, a decrease in blood flow can be problematic to the body's most important functions. Often this is due to an unhealthy lifestyle. During exercise, nitric oxide is released into the blood vessels, causing them to expand and improve blood flow throughout the body. N.O. Pro is formulated to accelerate the production of nitric oxide and increase blood flow when (and where) you need it most.
Complete Supplement Facts & Active Ingredients
Verified formulation profile per official label documentation (4 Vegetable Capsules per Serving | 30 Servings Per Bottle):
Supplement Facts
Serving Size: 4 Vegetable Capsules | Servings Per Container: 30
Amount Per Serving
% Daily Value
L-Arginine HCl
1,200 mg (1.2 g) **
Arginine Alpha-Ketoglutarate (AAKG)
1,200 mg (1.2 g) **
Citrulline Malate
610 mg **
Beet (Beta vulgaris) (root)
160 mg **
** Daily Value (DV) not established.
Other Ingredients: Vegetable cellulose (capsule), magnesium stearate, silica.
Allergen & Dietary Information: Gluten-Free, Soy-Free, Non-GMO, 100% Vegetarian/Vegan formulation. Manufactured in a cGMP facility in the USA with globally sourced raw materials.
Active Ingredient Scientific Profiles
1. L-Arginine HCl (1,200 mg): Free-form essential amino acid required as the direct biological substrate for vascular eNOS enzymes to catalyze endogenous nitric oxide production.
2. Arginine Alpha-Ketoglutarate / AAKG (1,200 mg): Combines L-arginine with alpha-ketoglutarate, an intermediate in the cellular Krebs (citric acid) cycle, supporting cellular ATP generation and anaerobic peak power output.
3. Citrulline Malate (610 mg): A non-essential amino acid bonded to malic acid. Bypasses splanchnic extraction to raise circulating serum arginine levels more effectively than free arginine alone while buffering muscle acidosis.
Suggested Use: As a dietary supplement for healthy adults, take four (4) vegetable capsules with 8–12 oz of water approximately 30 minutes prior to resistance training, cardiovascular exercise, or physical activity. On non-training days, take 4 capsules between meals to maintain systemic vascular support. Do not exceed two servings (8 capsules) within a 24-hour period.
Important Medical Warnings & Potential Contraindications:
Antihypertensive & Vasodilatory Medications: Do not use this product without physician approval if you take prescription medications for high or low blood pressure, or medications containing organic nitrates (such as nitroglycerin).
PDE-5 Inhibitors: Concomitant use with erectile dysfunction medications (e.g., sildenafil, tadalafil) can cause additive, clinically significant hypotension (dangerous drops in blood pressure).
Surgical Notice: Discontinue supplementation at least 14 days prior to any planned surgical, elective, or dental procedure due to altered hemodynamic blood flow.
Pregnancy & Nursing: Not recommended for pregnant or lactating women without explicit supervision by an OB/GYN or qualified maternal healthcare provider.
Cold Sores / HSV Recurrence: Individuals prone to the herpes simplex virus should note that high supplemental levels of L-arginine may trigger flare-ups unless balanced with sufficient dietary L-lysine.
* Disclaimer: Statements on this page have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your licensed physician before beginning any new exercise or supplement regimen.
Frequently Asked Questions (FAQ)
1. What are the key benefits of Zhou Nutrition N.O. Pro capsules?
Zhou Nutrition N.O. Pro is formulated to elevate systemic nitric oxide levels, promoting vasodilation (blood vessel widening). Benefits include increased delivery of oxygen and nutrients to active muscle tissue, enhanced cellular pumps during resistance training, delayed onset of anaerobic fatigue, and improved exercise recovery without reliance on nervous system stimulants.
2. How does Citrulline Malate enhance L-Arginine in this formula?
While L-Arginine is the direct substrate for nitric oxide synthase, much of it is broken down in the gut and liver by arginase enzymes. L-Citrulline bypasses this first-pass hepatic extraction and converts to L-arginine in the kidneys. Clinical research demonstrates that combining citrulline with arginine elevates and sustains plasma arginine concentrations more effectively than high doses of arginine alone.
3. Can I take N.O. Pro with my caffeinated pre-workout or coffee?
Yes. Zhou N.O. Pro is 100% stimulant-free and contains no caffeine. It can be stacked with a caffeinated beverage, standalone pre-workout powder, beta-alanine, or creatine monohydrate. However, caffeine has mild vasoconstrictive properties, so taking N.O. Pro alone or with moderate caffeine delivers the cleanest, most pronounced vascular muscle pump.
4. When is the best time to take Zhou N.O. Pro?
For optimal exercise performance, take all four (4) capsules with 8 to 12 ounces of water 30 minutes before your workout. This timing aligns peak blood amino acid concentrations with the onset of training. On rest days, you may take 2 to 4 capsules in the morning or between meals to maintain cardiovascular blood flow support.
5. Does Zhou N.O. Pro contain gluten, soy, or animal gelatin?
No. Zhou Nutrition N.O. Pro uses 100% plant-derived vegetable cellulose capsules and contains no porcine or bovine gelatin. It is thoroughly verified gluten-free, soy-free, and non-GMO, making it fully suitable for vegan and vegetarian lifestyles.
Campbell, B., et al. (2006). "Pharmacokinetics, safety, and effects on exercise performance of L-arginine alpha-ketoglutarate in trained adult men." Nutrition, 22(9), 872–881. [PMID: 16928472]
Schwedhelm, E., et al. (2008). "Pharmacokinetic and pharmacodynamic properties of oral L-citrulline and L-arginine: impact on nitric oxide metabolism." British Journal of Clinical Pharmacology, 65(1), 51–59. [PMID: 17662090]
Pérez-Guisado, J., & Jakeman, P. M. (2010). "Citrulline malate enhances athletic anaerobic performance and relieves muscle soreness." Journal of Strength and Conditioning Research, 24(5), 1215–1222. [PMID: 20386132]
Bailey, S. J., et al. (2009). "Dietary nitrate supplementation reduces the O2 cost of low-intensity exercise and enhances tolerance to high-intensity exercise in humans." Journal of Applied Physiology, 107(4), 1144–1155. [PMID: 19661447]
Lundberg, J. O., Gladwin, M. T., & Weitzberg, E. (2015). "Strategies to increase nitric oxide biology." Nature Reviews Drug Discovery, 14(9), 623–641. [PMID: 26265312]
