Caymus Nutrition | Burn Rate | 20 Servings

Caymus | Burn Rate is not a thermogenic in the classic stimulant-driven sense based on this verified panel. It is a fully disclosed, stimulant-free pump and performance formula built around nitric oxide support, hyperhydration, and sustained muscle fullness. The formulation strategy is straightforward and intelligent: use a clinical dose of citrulline malate as the base, reinforce the nitric oxide pathway with arginine AAKG, agmatine, and norvaline, then layer in glycerol plus electrolytes to increase intracellular and extracellular water retention for a denser, fuller training effect. This is a pump formula for people who want to feel their workout, not just get amped for it.

The centerpiece is 6,000mg L-Citrulline Malate. Citrulline is the most credible foundation ingredient in this category because it raises arginine levels more reliably than oral arginine itself by bypassing much of the first-pass breakdown that limits arginine absorption. That matters because arginine is the direct substrate for nitric oxide synthase, which drives nitric oxide production and vasodilation. At 6g, this lands right in the clinically relevant range commonly used to improve blood flow, muscle oxygenation, and training performance. In the gym, this is the ingredient most responsible for the expanding pump, improved work capacity, and better “connection” during repeated sets.

GlycerSize™ contributes 5,000mg glycerol powder, which is a serious dose for cell volumization and hyperhydration. Glycerol works osmotically, helping the body retain more water and increasing fluid availability inside muscle tissue. The result is a rounder, denser look and a more saturated muscle feel during training. Unlike a simple nitric oxide ingredient, glycerol changes the hydration side of the equation, so the pump feels wetter and more persistent rather than just transient vasodilation. That is why the 6g citrulline + 5g glycerol pairing is one of the strongest features of this formula.

L-Arginine Alpha-Ketoglutarate at 1,500mg is not the primary driver here, but it is a useful support ingredient layered on top of citrulline. Citrulline does the heavy lifting for systemic arginine elevation, while AAKG provides direct arginine substrate and alpha-ketoglutarate support within a performance context. Agmatine Sulfate at 1,000mg is a standout inclusion. Agmatine is a metabolite of arginine that is widely used in pump formulas to help modulate nitric oxide pathways and prolong the vascular effect. At 1g, this is a meaningful, fully felt dose in real-world pre-workout use.

L-Norvaline at 150mg sits in the common effective range for sports nutrition formulas. Its value is as an arginase-pathway support ingredient: by helping reduce the breakdown pressure on arginine, it can support more sustained nitric oxide signaling when paired with citrulline and agmatine. Human data here is more limited than for citrulline, but the formulation logic is sound and the dose is appropriate for a synergy role.

AstraGin® at 25mg is included for absorption support, using astragalus membranaceus and panax notoginseng extracts to upregulate intestinal nutrient transporter expression. The more commonly cited standalone target is 50mg, so 25mg is best viewed as supportive rather than fully loaded. It still makes sense in a formula heavy in amino-derived pump ingredients. Calcium at 45mg and potassium at 75mg are not clinical electrolyte doses on their own, but they support hydration balance alongside glycerol.

The synergy is the real story. Citrulline raises nitric oxide capacity, arginine and agmatine reinforce the pathway, norvaline helps preserve it, and glycerol plus electrolytes make sure the resulting pump is visually and physically amplified through hydration. Importantly, the label is fully disclosed with no proprietary blend, which is a major advantage in a category full of underdosed pump products hiding behind blend names. Day 1, expect fuller muscles, more vascularity, and a stronger pump. Over 2-4 weeks, the experience becomes more repeatable as you learn your hydration strategy, dosing timing, and stacking approach with food, sodium, and water intake.

How to Use Caymus | Burn Rate