Bucked Up Black vs Transparent Labs STIM-FREE Pre-Workout
The verdict
- Transparent Labs STIM-FREE Pre-Workout scores 40.0 points higher than Bucked Up Black on formula: 100.0 (S tier) vs 60.0 (C tier).
- Caffeine: 200 mg vs 0 mg.
- Both labels have 0% hidden in blends.
- STIM-FREE Pre-Workout is $1.66 cheaper per clinically dosed serving at $1.67, compared with $3.33 for Black.
- Testing: Black is untested; STIM-FREE Pre-Workout is Verified (T2).
- Largest panel dose differences for Black vs STIM-FREE Pre-Workout: Betaine Anhydrous: none listed vs 2,500 mg; L-Tyrosine: none listed vs 1,000 mg; Taurine: 100 mg vs 1,300 mg.
- Bottom line: STIM-FREE Pre-Workout has the higher formula score and the lower comparable cost.
Straight from the label math; no editorial picks. We don't earn a commission from store links on this site.
| Metric | ||
|---|---|---|
| Scores | ||
| Tier | C · 60.0 | S · 100.0 (best) |
| Overall score | 42.8 | 91.3 (best) |
| Dose | 60.0 | 100.0 (best) |
| Transparency | 100.0 | 100.0 |
| Pump | 60.0 | 60.0 |
| Focus | 10.0 | 90.0 (best) |
| Endurance | 42.8 | 100.0 (best) |
| Caffeine | 200 mg · ⚡ Standard Send | 0 mg · 😴 Night Shift |
| Lowest price | $49.99 | $49.99 |
| Per clinically dosed serving | $3.33 · 💎 Luxury Pixie Dust | $1.67 · 👍 Fair Price (best) |
| Real servings | 15 of 30 | 30 of 30 (best) |
| Testing | Untested | T2 · Verified (best) |
| Ingredients (per graded serving) | ||
| L-Citrulline (counts toward the tier) | 4,000.2 mg100% ✓ | 5,333.6 mg100% ✓ |
| Caffeine (counts toward the tier) | 200 mg100% ✓ | missing |
| Betaine Anhydrous (counts toward the tier) | missing | 2,500 mg100% ✓ |
| Taurine (counts toward the tier) | 100 mg10% | 1,300 mg100% ✓ |
| L-Tyrosine (counts toward the tier) | missing | 1,000 mg100% ✓ |
| L-Theanine (counts toward the tier) | missing | missing |
| Beta-Alanine | 2,000 mg63% | 4,000 mg100% ✓ |
| Senactiv | 25 mg | 50 mg |
| Sodium (Electrolytes) | 45 mg | 150 mg |
| Alpha-GPC | 100 mg33% | — |
| AstraGin | 25 mg | — |
| BioPerine (Black Pepper Extract) | — | 5 mg |
| Deer Antler Velvet Extract | 50 mg | — |
| Humic/Fulvic Mineral Blend Extract | 35 mg | — |
| Huperzine A | — | 100 mcg100% ✓ |
| Potassium | — | 100 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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