Purus Labs | Noxygen | 40 Servings

Purus Labs Noxygen Powder is a focused stim-free pump and hydration formula, not a kitchen-sink pre-workout pretending to do everything at once. Its strategy is simple and intelligent: pair glycerol-driven hyperhydration with nitrate-based nitric oxide support so the user gets fuller muscles, better training blood flow, and a more pronounced pump without caffeine, beta-alanine, or unnecessary filler. At 2.8g per scoop, this is clearly designed as a stackable performance tool rather than a standalone all-in-one pre-workout.

The first major active is HydroMax®, a high-yield glycerol powder from Glanbia Nutritionals. Here it supplies 1,500mg of glycerol powder standardized to a minimum 65% glycerol. Glycerol works as an osmolyte, meaning it helps pull and retain water in body compartments, supporting hyperhydration, muscle cell volume, and that denser, rounder training feel athletes describe as a “skin-splitting pump.” In practical terms, glycerol tends to improve workout fullness, help maintain fluid balance during hard training, and reduce the flat feeling that can show up in long sessions or low-carb phases. A 1.5g HydroMax® dose sits in the effective range commonly used in pump formulas and aligns with real-world dosing for hydration and volumization support.

The second piece is the 740mg NOXygen® blend built from sodium nitrate and betaine nitrate as NO3-T®. Nitrates support nitric oxide production through the nitrate-to-nitrite-to-NO pathway, which is distinct from the arginine-based pathway used by citrulline. That matters because it gives this product a legitimate vasodilation angle even without citrulline. Better nitric oxide signaling means improved blood vessel relaxation, blood flow, nutrient delivery, and the subjective experience of stronger pumps and better work capacity. NO3-T® is a well-known trademarked nitrate ingredient from ThermoLife, valued because nitrates are difficult to formulate well and quality control matters. The limitation is transparency: while the total blend weight is disclosed at 740mg, the individual amounts of sodium nitrate and betaine nitrate are not. That means we can confidently say the formula uses meaningful nitrate ingredients, but we cannot precisely benchmark each nitrate source against standalone research doses.

There is still a useful secondary role here from the nitrate forms themselves. Sodium nitrate contributes both nitrate delivery and sodium, and sodium is not a throwaway inclusion in a pump formula. It helps support fluid balance and plasma volume, which can enhance the effect of glycerol. Betaine nitrate adds another nitrate source and potentially some of betaine’s osmolyte characteristics, though the dose is almost certainly below typical standalone betaine performance dosing because the full blend is only 740mg.

The synergy is the selling point. HydroMax® helps pull water into the system and working muscles, while NO3-T® helps improve vessel relaxation and blood flow. One ingredient increases the fluid available for performance and fullness; the other helps move that blood and fluid where you want it during training. That is why this formula works best for visible pumps, high-rep work, and extended sessions where fullness usually fades.

On transparency, this is mostly straightforward but not perfect. HydroMax® is clearly dosed at 1,500mg, which is excellent. The nitrate portion is disclosed only as a 740mg blend, so individual nitrate doses remain hidden. That is more honest than a massive all-in-one proprietary matrix, but it still limits precise clinical comparison.

What to expect: on day 1, most users notice improved fullness, better hydration feel, and a smoother pump during training, especially if they are already well-hydrated. Over 2-4 weeks, the effect does not “load” like creatine or beta-alanine, but users often get better at using it: dialing in water intake, sodium intake, and stacking strategy to make workouts look and feel consistently better.

How to Use Purus Labs Noxygen Powder