Stim-Free Pump Review
- Genuinely caffeine-free
- Simple, short ingredient list
- Reasonable citrulline malate dose
- No focus or mood support at all
- Performance support is fairly light
- Beta-alanine underdosed relative to research
Effects Timeline
AI-estimated changes in effects over the first 3 hours after taking the recommended serving.
Stim-Free Pump is a narrow formula built around pumps specifically, and it does modestly there without excelling.
Performance support is light, and there is no focus or mood ingredient in the formula at all.
One ingredient (Glycerol Powder) is not a pure compound -- based on how virtually every modern glycerol powder on the market is formulated, we estimated its real glycerol content rather than crediting the full label weight.
Best for: People who want a simple, no-frills pump product and already have energy and focus covered by something else.
Ingredient breakdown
Every dose · every gap| Ingredient | Clinically effective dose | Dose in Stim-Free Pump | Status |
|---|---|---|---|
| Beta Alanine | 4.5 g | 3 g | 67%Moderate dose |
| Citrulline Malate 2:1 | 4 g | 3 g | 75%Moderate dose |
| Glycerol Powder | 4–20 g | 1.95 g | 49%Under-dosed |
| Agmatine Sulfate | 1 g | 0.25 g | 25%Under-dosed |
| Cluster Dextrin | N/A -- fast-digesting carbohydrate source, not a scored performance ingredient | 725 mg | No evidence |
- Beta Alanine3 g67%Moderate dose
- Citrulline Malate 2:13 g75%Moderate dose
- Glycerol Powder1.95 g49%Under-dosed
- Agmatine Sulfate0.25 g25%Under-dosed
- Cluster Dextrin725 mgNo evidence
Evidence references
Effect of Beta-Alanine Supplementation on Maximal Intensity Exercise in Trained Young Male Individuals: A Systematic Review and Meta-Analysis
Beta-alanine and carnosine loading
