ONYX Preworkout

Onyx — Stimulant Pre-Workout by Kinstone Labs

Some pre-workouts give you energy. Some give you pumps. Onyx gives you both, at full volume.

Built for lifters who want to walk into the gym and immediately feel it, Onyx is engineered for massive blood flow, skin-splitting fullness, and locked-in focus that carries you from your first rep to your last drop set.

Formulated by Kinstone Labs with caffeine and paraxanthine, Onyx delivers fast-hitting energy alongside smoother, longer-lasting focus — so you get the jolt without the jagged crash that comes from caffeine alone.

Why lifters are switching to Onyx:

• Massive, Lasting Pumps — engineered to maximize nitric oxide production and vasodilation, so blood keeps flowing where you need it, set after set.

• Dual-Source Energy — caffeine for the fast hit, paraxanthine for smoother, more sustained focus without the harsh comedown.

• Locked-In Focus — dialed in and driven from warm-up to the last rep.

• Built Like Onyx — dense, dark, and unyielding energy for training sessions that demand everything you've got.

Whether you're chasing max pumps, max energy, or both, Onyx is built to deliver the full experience in every scoop.

Kinstone Labs. Solid nutrition. Built different.

These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.