Arms Race Nutrition Harness RTD Best By (02/2026)

ARN Harness RTD delivers the same energy, focus, and pump as our original HARNESS pre-workout powder, but in a convenient ready-to-drink format. No shaker, no water needed. Each can delivers 350 mg total caffeine from 300 mg Caffeine Anhydrous and 75 mg Di-Caffeine Malate for long-lasting energy, available in five mouth-watering flavors.

elevATP®
It’s like rocket fuel for your muscles. elevATP® increases ATP production, helping improve blood flow, oxygen delivery, and glucose uptake to support hard-working muscles.

Alpha GPC 50%
Say goodbye to brain fog. Alpha GPC 50% supports cognitive function, helping improve mental clarity, memory, and learning so you stay sharp and focused through every task.

L-Citrulline
L-Citrulline supports nitric oxide production, helping improve blood flow to working muscles. This can reduce muscle soreness and support better aerobic performance and endurance.

Caffeine Anhydrous
A core pre-workout ingredient that helps boost energy, focus, and workout intensity so you can push through tough training sessions.

Dicaffeine Malate
Provides sustained-release caffeine for smoother, longer-lasting energy without the sudden crash.