C4 Original Pre Workout
vs Transparent Labs Bulk Black Pre Workout
Ingredient & Score Comparison
Last updated: Feb 2026
PwrRanks Verdict
Score Comparison
Objective scores based on ingredient dosing — 0 to 1 scale
Transparent Labs Bulk Black Pre Workout's 331mg total caffeine contributes to a higher energy score.
Transparent Labs Bulk Black Pre Workout's formula has 8g L-Citrulline Malate and 2.5g Betaine Anhydrous, which contribute to a higher pump score.
C4 Original Pre Workout's formula has 5mg Huperzine, which contributes to a higher focus score.
C4 Original Pre Workout delivers more performance per dollar than Transparent Labs Bulk Black Pre Workout — based on how both products compare to the broader pre-workout market.
Ingredient Comparison
C4 Original vs Transparent Labs Bulk Black — dosing per serving
| Ingredient | Objective | C4 Original | Transparent Labs Bulk Black |
|---|---|---|---|
| Caffeine Yield | Energy | 200mg | 331mg |
| Theobromine | Energy | — | 100mg |
| L-Citrulline Malate | Pump | — | 8g |
| Betaine Anhydrous | Pump | — | 2.5g |
| Taurine | Pump | — | 1.3g |
| L-Citrulline | Pump | 1.2g | — |
| Sodium | Pump | — | 180mg |
| L-Tyrosine | Focus | — | 1g |
| Alpha-GPC | Focus | — | 300mg |
| L-Theanine | Focus | — | 200mg |
| Huperzine | Focus | 5mg | — |
| Beta-Alanine | - | 2g | 4g |
| L-Arginine HCI | - | 1.2g | — |
| Creatine Nitrate | - | 1g | — |
| PeptiPump | - | 100mg | — |
| Senactiv | - | — | 50mg |
| Black Pepper Extract | - | — | 5mg |
| Boron | - | — | 3mg |
Who Should Buy Each
Matching products to training goals and stim tolerance
Choose C4 Original If…
- ✓You want sharp mental focus that lasts through the full session
- ✓You want sustained energy without extreme stimulation
Choose Transparent Labs Bulk Black If…
- ✓You want a high energy formula without exotic stimulants
- ✓Mind-muscle connection is as important to you as raw energy
- ✓You want the edge taken off stimulant intensity — focused without feeling wired
- ✓Pump and vascularity are a priority in your training
Frequently Asked Questions
Common questions about these two pre-workouts
Transparent Labs Bulk Black Pre Workout has 331mg total caffeine per serving compared to 200mg in C4 Original 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.