Rule 1 - Citrulline

Fuel your workouts with pure L‑Citrulline, a powerful nitric oxide booster designed to support enhanced blood flow, muscle pumps, endurance, and recovery. As part of Rule1’s Foundation Series, this unflavored powder mixes easily into any drink—perfect for stacking with protein or pre-workout supplements.  Key Benefits 3 g of pure L‑Citrulline per scoop for enhanced nitric oxide production Supports increased muscle pumps, vascularity, and nutrient delivery during workouts Helps delay fatigue and support endurance Mix-friendly—no flavors, sweeteners, or fillers; ideal for custom blends Ingredient Amount per Serving L‑Citrulline 3 g Silicon Dioxide (anti-caking) trace