Best Overall
PEScience High Volume
Key details
- Flavor
- Melon Berry Twist
- Caffeine
- Free
- L-citrulline
- 0.21 oz
- Arginine Nitrate
- 0.07 oz
Six grams of pure L-citrulline is the number that makes High Volume the first tub we reach for when we want a caffeine-free session to still feel productive. It pairs that dose with 2 grams of arginine nitrate, and neither ingredient comes with caffeine. That matters for an evening lift: you get the pump and endurance support without paying for it at bedtime. The Melon Berry Twist flavor is mild rather than candy-sweet, which is a relief in a category where fruit flavors often turn into syrup.
What we appreciate most is how complete it feels without a stimulant. Sodium and magnesium add electrolytes, while taurine and HydroMax glycerol support hydration, so it works as a solo pre-workout instead of forcing you to stack three products. We used it for evening sessions and found the pump arrives without the edgy, itchy feeling that beta-alanine-heavy formulas can bring.
It is not a magic energy drink. If you want a caffeine-style jolt, High Volume will feel quiet by comparison, and no stim-free powder fixes that. What it does give you is a formula you can use late, stack with a caffeinated product when you choose, and actually finish. For us, it is the rare stim-free tub that does not feel like a compromise.
Pros
- 6 g pure L-citrulline per serving
- Zero caffeine but still stackable
- Electrolytes and glycerol support hydration
- Mild Melon Berry flavor
Cons
- Costs more than the budget picks
High Volume is our top pick for caffeine-free training: 6 grams of pure citrulline, 2 grams of nitrate, and a mild flavor that works for late sessions.