Fierce Pre Workout
vs Prime Labs Pre-Workout
Ingredient & Score Comparison
Last updated: Feb 2026
PwrRanks Verdict
Score Comparison
Objective scores based on ingredient dosing — 0 to 1 scale
Prime Labs Pre-Workout delivers more performance per dollar than Fierce Pre Workout — based on how both products compare to the broader pre-workout market.
Ingredient Comparison
Fierce vs Prime Labs — dosing per serving
| Ingredient | Objective | Fierce | Prime Labs |
|---|---|---|---|
| Caffeine Yield | Energy | 300mg | 253mg |
| Theobromine | Energy | — | 50mg |
| L-Citrulline | Pump | 4g | 4g |
| Betaine Anhydrous | Pump | 2g | — |
| Agmatine | Pump | 500mg | 1g |
| Taurine | Pump | 1g | 1g |
| Sodium | Pump | — | 200mg |
| L-Theanine | Focus | 150mg | — |
| Beta-Alanine | - | — | 2g |
| Malic Acid | - | — | 2g |
| Beet Root Powder | - | 500mg | — |
| Aquamin Sea Minerals | - | 250mg | — |
| Ashwagandha Extract | - | 200mg | — |
| Coconut Water | - | 150mg | — |
| Cordyceps Extract | - | 125mg | — |
| Synephrine HCl | - | 100mg | — |
| Green Tea Extract | - | — | 45mg |
| Calcium | - | 30mg | — |
| Naringin Extract | - | — | 20mg |
| Juniper Extract | - | — | 15mg |
| Vitamin B3 | - | 10mg | — |
| Black Pepper Extract | - | 5mg | 5mg |
| Vitamin B6 | - | 2mg | — |
| Vitamin B12 | - | 10mcg | — |
Who Should Buy Each
Matching products to training goals and stim tolerance
Choose Fierce If…
- ✓You want the edge taken off stimulant intensity — focused without feeling wired
- ✓You do not like the Beta-Alanine tingles
Choose Prime Labs If…
- No strong differentiators for this product in this comparison.
Frequently Asked Questions
Common questions about these two pre-workouts
Fierce Pre Workout has 300mg total caffeine per serving compared to 253mg in Prime Labs Pre-Workout.
More Comparisons
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.