GAT Sport Nitraflex vs Transparent Labs STIM-FREE Pre-Workout
The verdict
- Transparent Labs STIM-FREE Pre-Workout scores 87.3 points higher than GAT Sport Nitraflex on formula: 100.0 (S tier) vs 12.7 (F tier).
- Caffeine: 325 mg vs 0 mg.
- Hidden-blend share is 57.5% for Nitraflex and 0% for STIM-FREE Pre-Workout.
- STIM-FREE Pre-Workout costs $1.67 per clinically dosed serving. Nitraflex does not have a comparable clinically dosed price.
- Testing: Nitraflex is untested; STIM-FREE Pre-Workout is Verified (T2).
- Largest panel dose differences for Nitraflex vs STIM-FREE Pre-Workout: Betaine Anhydrous: none listed vs 2,500 mg; L-Citrulline: 0 mg vs 5,333.6 mg; L-Tyrosine: 0 mg vs 1,000 mg.
- Bottom line: STIM-FREE Pre-Workout has the higher formula score.
Straight from the label math; no editorial picks. We don't earn a commission from store links on this site.
| Metric | ||
|---|---|---|
| Scores | ||
| Tier | F · 12.7 | S · 100.0 (best) |
| Overall score | 15.8 | 91.3 (best) |
| Dose | 30.0 | 100.0 (best) |
| Transparency | 42.5 | 100.0 (best) |
| Pump | 33.3 | 60.0 (best) |
| Focus | 0.0 | 90.0 (best) |
| Endurance | 46.9 | 100.0 (best) |
| Caffeine | 325 mg · 🚀 Heart Go Brrr | 0 mg · 😴 Night Shift |
| Lowest price | $29.99 (best) | $49.99 |
| Per clinically dosed serving | $1.23 · Underdosed | $1.67 · 👍 Fair Price (best) |
| Real servings | 24.4 of 30 | 30 of 30 (best) |
| Testing | Untested | T2 · Verified (best) |
| Ingredients (per graded serving) | ||
| L-Citrulline (counts toward the tier) | hidden in blend0% | 5,333.6 mg100% ✓ |
| Caffeine (counts toward the tier) | 325 mg100% ✓ | missing |
| Betaine Anhydrous (counts toward the tier) | missing | 2,500 mg100% ✓ |
| L-Tyrosine (counts toward the tier) | hidden in blend0% | 1,000 mg100% ✓ |
| Taurine (counts toward the tier) | missing | 1,300 mg100% ✓ |
| L-Theanine (counts toward the tier) | hidden in blend0% | missing |
| Beta-Alanine | 1,500 mg47% | 4,000 mg100% ✓ |
| Sodium (Electrolytes) | 82 mg | 150 mg |
| BioPerine (Black Pepper Extract) | — | 5 mg |
| Huperzine A | — | 100 mcg100% ✓ |
| Nitrosigine (Inositol-Stabilized Arginine Silicate) | 1,000 mg67% | — |
| Potassium | — | 100 mg |
| Senactiv | — | 50 mg |
= best in the row. = part of the ideal pre and counts toward the tier. Percentages are of the clinical reference dose.
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