Gainful Caffeine Free Pre‑Workout
vs Pump Serum
Ingredient & Score Comparison
Last updated: Feb 2026
PwrRanks Verdict
Score Comparison
Objective scores based on ingredient dosing — 0 to 1 scale
Pump Serum's formula has 10g L-Citrulline and 4g Glycerol, which contribute to a higher pump score.
Pump Serum's formula has 3g L-Tyrosine, which contributes to a higher focus score.
Pump Serum delivers more performance per dollar than Gainful Caffeine Free Pre‑Workout — based on how both products compare to the broader pre-workout market.
Ingredient Comparison
Gainful Caffeine Free Pre‑Workout vs Pump Serum — dosing per serving
| Ingredient | Objective | Gainful Caffeine Free Pre‑Workout | Pump Serum |
|---|---|---|---|
| L-Citrulline | Pump | — | 10g |
| L-Citrulline Malate | Pump | 4g | — |
| Glycerol | Pump | — | 4g |
| Betaine Anhydrous | Pump | — | 3g |
| Arginine Nitrate | Pump | — | 3g |
| Taurine | Pump | — | 3g |
| Agmatine | Pump | — | 1.5g |
| Casein Hydrolysate | Pump | — | 254mg |
| Sodium | Pump | 15mg | — |
| L-Tyrosine | Focus | — | 3g |
| Beta-Alanine | - | 1.5g | 6.4g |
| Creatine Monohydrate | - | 3g | — |
| Leucine | - | 1g | — |
| Isoleucine | - | 500mg | — |
| Valine | - | 500mg | — |
| Black Pepper Extract | - | — | 10mg |
Who Should Buy Each
Matching products to training goals and stim tolerance
Choose Gainful Caffeine Free Pre‑Workout If…
- No strong differentiators for this product in this comparison.
Choose Pump Serum If…
- ✓Pump and vascularity are a priority in your training
- ✓You enjoy hydration-based pump ingredients that give a swollen and full look during training
Frequently Asked Questions
Common questions about these two pre-workouts
Both are low-stim or stimulant-free (0mcg or less per serving).
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How PwrRanks Scores Pre-Workouts
Our methodology
PwrRanks scores every pre-workout by analyzing its ingredient label algorithmically. We generate four objective scores — Energy, Pump, Focus, and Value — that reflect what's in the tub, not how the product is marketed. Value scores are calculated using live pricing data to reflect real cost-per-serving at time of comparison.