Huge Supplements
Pump Serum
Maximum pump formula — 7 pump ingredients, zero stimulants
Last updated: February 18, 2026
Quick Summary
Pump Serum by Huge Supplements is a pump-only powerhouse with 7 dedicated pump ingredients. 8g citrulline, 4g glycerol, and Nitrosigine deliver skin-splitting vascularity.
Pros & Cons
Pros
- +7 dedicated pump ingredients for maximum vascularity
- +Massive 40 servings per tub — outstanding value
- +HydroPrime glycerol + citrulline + Nitrosigine triple-stack
- +Stackable with any stimulant pre-workout
Cons
- −No endurance ingredients (no beta-alanine or betaine)
- −Purely pump-focused — won't help with energy or focus
- −Large scoop size requires lots of water
Key Ingredients
| Ingredient | Dose |
|---|---|
| L-Citrulline | 8g |
| HydroPrime Glycerol | 4g |
| Nitrosigine | 1.5g |
| S7 | 100mg |
| VasoDrive-AP | 254mg |
| Pine Bark Extract | 200mg |
| AstraGin | 50mg |
Full Review
Huge Supplements already proved they know how to formulate with Wrecked. Pump Serum takes that pump expertise and distills it into a pure, stim-free pump product that's among the most loaded on the market.
Pump Quality: This is what Pump Serum was built for, and it delivers emphatically. 8g L-citrulline is at the top of the market, matching Transparent Labs BULK and Wrecked. But the real story is the supporting cast: 4g HydroPrime glycerol (double the dose in most competitors), 1.5g Nitrosigine, S7 plant-based NO booster, VasoDrive-AP for blood vessel relaxation, and pine bark extract. These seven ingredients attack pump production from every possible pathway.
The Pump Experience: Users consistently report that Pump Serum delivers some of the most dramatic pumps available in any pre-workout, stimulated or not. The combination of citrulline (nitric oxide), glycerol (cell volumization), and Nitrosigine (sustained NO) creates a layered pump that builds progressively and lasts well after your workout. Expect noticeable vascularity and muscle fullness from the first set.
What It's NOT: Pump Serum is purely a pump product. No beta-alanine for endurance, no betaine for power, no nootropics for focus. If you want those benefits, stack it with a comprehensive pre-workout or supplement them separately.
Stacking Potential: This is where Pump Serum really shines. Stack it with a moderate-caffeine pre-workout like C4 Original or Alani Nu, and you get the energy plus elite-level pumps. Stack it with a nootropic like Alpha Lion Superhuman for focus plus pumps. The zero-stim formula means zero interference with whatever else you're taking.
Value: 40 servings at $39.99 works out to ~$1.00 per serving. For a pump product this loaded — with premium ingredients like Nitrosigine, HydroPrime, S7, and VasoDrive-AP — this is exceptional value. Most competitors with similar ingredient profiles charge $1.50-2.00 per serving for fewer servings.
Taste & Mixability: Strawberry Lemonade and Mango are the standout flavors. Despite the massive scoop size (those 7 ingredients add up), it mixes reasonably well with 16-20oz of water.
The Bottom Line: Pump Serum is the best pure pump product we've reviewed. If you want the most dramatic pumps possible and plan to get your energy and endurance from other sources, nothing beats the 7-ingredient pump stack at this price point. The 40-serving tub makes it a no-brainer for pump chasers.
Frequently Asked Questions
How much caffeine is in Pump Serum?▼
Pump Serum is a stimulant-free pre-workout with 0mg of caffeine.
How many servings are in Pump Serum?▼
Each tub of Pump Serum contains 40 servings at a price of $39.99, which works out to $1.00 per serving.
What are the key ingredients in Pump Serum?▼
The key ingredients include L-Citrulline (8g), HydroPrime Glycerol (4g), Nitrosigine (1.5g), S7 (100mg), VasoDrive-AP (254mg), Pine Bark Extract (200mg), AstraGin (50mg).
Is Pump Serum good for beginners?▼
With 0mg of caffeine, Pump Serum has a stimulant-free stimulant profile that can be suitable for beginners. Always start with a half dose to assess tolerance.
What Others Are Saying
Best standalone pump product on the market
Ivan D.
November 27, 2025
Huge Supplements Pump Serum is the one pump product I always come back to. The combination of citrulline, agmatine, glycerol, and S7 creates the most insane pumps I've experienced. I stack it with a half scoop of my stim pre and my veins are practically exploding. Bodybuilders and physique athletes need this in their stack.
Stack this with anything for incredible pumps
Fiona M.
January 17, 2026
Pump Serum is my secret weapon. I add a half scoop to whatever pre-workout I'm using and the pump improvement is dramatic. Huge Supplements clearly put serious thought into the nitric oxide pathways targeted here — multiple ingredients working through different mechanisms means sustained, full-muscle pumps that last. Worth every penny.
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