Metabolic Nutrition
Stim-Free Pump Review
Servings / container
30
Price per serving
$1.00
Cost per point
$0.30
per formula score point
Caffeine
0 mg
≈ 0 cups of coffee
Strengths
- Genuinely caffeine-free
- Simple, short ingredient list
- Reasonable citrulline malate dose
Watch-outs
- No focus or mood support at all
- Performance support is fairly light
- Beta-alanine underdosed relative to research
Effects Timeline (1 serving)
AI-estimated changes in effects over the first 3 hours after taking 1 serving.
Stim-Free Pump Ingredient breakdown
| 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 | 725 mg | Unscored |
- 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 mgUnscored
AI analysis
Stim-Free Pump is a narrow formula built around pumps specifically, and it delivers a modest, not exceptional, pump.
Performance support is light, and there's nothing here for focus or mood at all.
Honest take: A narrow, modest pump product that doesn't do enough to stand out.
Evidence references
Int J Sport Nutr Exerc Metab · 2024 · n=331
Effect of Beta-Alanine Supplementation on Maximal Intensity Exercise in Trained Young Male Individuals: A Systematic Review and Meta-Analysis
Nutrients · 2026 · n=644
Effects of Citrulline Malate Supplementation on Exercise Performance: A Systematic Review and Three-Level Meta-Analysis
Amino Acids · 2016 · n=360
Beta-alanine and carnosine loading
